Clinical trials
Every registered trial of Human Chorionic Gonadotropin (HCG)
273 studies, 26 still enrolling.
Plain-Language Summary
Plain-language reading of the public trial registries.
In short
- Human Chorionic Gonadotropin (HCG) has been studied in people a great deal.
- 273 registered studies in total.
- 26 are still enrolling people, so this is active research, not just history.
What kind of research
- 237 studies actually gave the peptide to volunteers and measured what happened. This is the kind of study that can show whether something works.
- About 38,169 people took part in those.
- A further 36 studies only looked at records of people already taking it. These are counted separately because nobody was given the peptide for the study, so they cannot prove cause and effect.
How far along it is
- 108 trials have reached phase 3 or 4 — the large, late-stage trials regulators rely on to approve a drug.
- 63 have published results in the medical literature that anyone can read.
- The research spans 42 countries.
A registered trial is a plan, not a result. Registration means a study was declared in advance; it says nothing about whether the peptide worked, and a trial can be registered and then abandoned.
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Showing 273 of 273 trials for Human Chorionic Gonadotropin (HCG).
hCG Treatment for Rehabilitation From a TBI
VA Office of Research and Development
Traumatic Brain Injury
Purpose to Evaluate the Effectiveness of the Superovulation Stimulation Protocol Using Human Chorionic Gonadotropin (hCG) by Demonstrating Its Equivalence to Standard Controlled Ovarian Stimulation Protocols in Terms of Oocytes Retrieved, Blastulation While Maintaining an Economic Advantage
LTD "EKODNIPRO", Medical centre Medical Plaza Dnipro
Infertility (IVF Patients) · Infertility Assisted Reproductive Technology · Infertile Patients · Infertility Drugs
Gonadotropin Therapy in Idiopathic Hypogonadal Non-Obstructive
Indira IVF Hospital Pvt Ltd
APHRODITE Group
Comparison of Beta-hCG Levels When Using Venous Puncture Blood and Peripheral Finger Stick Blood
University of Nebraska
Pregnancy
The Application of HCG in Luteal Support for Frozen Embryo Transfer in Ovulation Cycle of Obese Women
The Second Hospital of Shandong University
Obesity, Maternal
Triggering Oocyte Maturation in POSEIDON Group 3 and 4 Poor Responders Using Double Trigger or HCG Trigger
Bedaya Hospital
Infertility
Triggering Ovulation in Normo-responders Using a Modified Dual Trigger Protocol or HCG Trigger
Bedaya Hospital
Infertility (IVF Patients)
Isotretinoin vs hCG for Male Infertility Due to Low or Absent Sperm
University of Nebraska
Oligospermia · Azoospermia, Nonobstructive · Infertility
Impact of Medically Supervised Performance-Enhancing Substances (PES) on Elite Athletes
Enhanced Emirates Limited
Safety and Impact of Medically Supervised Performance Enhancing Substance Usage in Healthy Elite Athletes
A Study to Compare the Efficacy and Safety of Follitropin Alfa/Lutropin Alfa Versus hMG in Japanese Participants With LH and FSH Deficiency Undergoing ART (HINATA)
Merck Healthcare KGaA, Darmstadt, Germany, an affiliate of Merck KGaA, Darmstadt, Germany
Infertility
FET-LET-2x2: Clinical Pregnancy Rates After Frozen Embryo Transfer in Natural and Modified Natural Cycles
University of Novi Sad
Infertility Female · Frozen Embryo Transfer (FET)
Early Luteal Phase Progesterone Kinetics After hCG-Induced Ovulation in Modified Natural Cycle
University Hospital, Montpellier
Luteal Phase Insufficiency
Comparison of Dydrogesterone Alone Versus Dydrogesterone Plus HCG in Threatened Miscarriage
Pakistan Air Force (PAF) Hospital Islamabad
Threatened Miscarriage · Early Pregnancy Bleeding
Interest of Sperm Insemination at 42 Hours Post hCG Compared to 36h in Intrauterine Insemination
University Hospital, Toulouse
Infertility · Intrauterine Insemination (IUI)
hCG Priming in Women With Diminished Ovarian Reserve
Kristine Loessl
Infertility, Female · Ovarian Reserve · In Vitro Fertilization (IVF)
The Role of hCG in Thawed Embryo Transfer
Fertility Center of Las Vegas
Infertility (IVF Patients)
Is There a Need for Luteal Support in Modified Natural Cycle Frozen Embryo Transfer Cycles
Dunamenti REK Istenhegyi IVF Center
Luteal Support · Frozen Embryo Transfer (FET)
The Study of Human Chorionic Gonadotropin (HCG) Activating the Dormant Follicles .
The Fourth Affiliated Hospital of Zhejiang University School of Medicine
Premature Ovarian Insufficiency
Sleep Quality and the Menstrual Cycle
University of Akureyri
Sleep Quality
Impact of the Presence of the Corpus Luteum on Pregnancies Obtained Through Frozen Embryo Transfer(FET)
Fundacion Clinic per a la Recerca Biomédica
Infertilities · Embryo Transfer
Efficacy of Human Chorionic Gonadotropin in Acute GVHD Treatment
Hospital Universitario Dr. Jose E. Gonzalez
Acute Graft Versus Host Disease
Comparison of the Effect of Gonadotropin and Clomiphene Citrate Treatment on Sperm Parameters and the Outcome of Assisted Reproductive Procedures in Subfertile Men Based on the APHRODITE Groups
Szeged University
Male Infertility
Luteal Phase Support With GnRH Agonist After GnRH Agonist Triggering in IVF/ICSI Cycles
Assistance Publique - Hôpitaux de Paris
In Vitro Fertilization · ICSI Intracytoplasmic Spermatozoid Injection
MIRA CONNECT Study
University of Colorado, Denver
Pregnancy of Unknown Location (PUL)
Effect of HCG on Endometrial Preparation in Frozen Embryo Transfer
Assiut University
IVF
Triggering Oocyte Maturation in Normoresponders Using Double Trigger or HCG Trigger
Bedaya Hospital
Infertility
The Effect of Dual Trigger (GnRH Agonist + hCG) for Final Maturation in Oocyte Donors With History of a Previous Cycle With Suboptimal Response to GnRH Agonist Only Trigger
Embryolab Fertility Clinic
Ovarian Stimulation · Human Chorionic Gonadotropin · Oocyte Donors
Comparison of Live Birth Rate in Natural Cycle Single Euploid FET Versus Without Luteal Phase Support
ART Fertility Clinics LLC
Pregnancy Related · Infertility, Female
Ruxolitinib, Human Chorionic Gonadotropin (uhCG/EGF), and Dose De-escalated Corticosteroids
Masonic Cancer Center, University of Minnesota
Acute-graft-versus-host Disease
Investigation of the Effects of Telerehabilitation Groups for Chronic Non-specific Low Back Pain.
Yeditepe University
Chronic Non-specific Low Back Pain
To Investigate Efficacy and Safety of a Single Injection of GenSci094 for Ovarian Stimulation Using Daily Recombinant FSH as Reference
Changchun GeneScience Pharmaceutical Co., Ltd.
Infertility
Sex Steroids Balance for Metabolic and Reproductive Health in Klinefelter Syndrome
Georgios Papadakis
Klinefelter Syndrome
HUMAN CHORIONIC GONADOTROPIN (HcG) VS MAGNESIUM SULPHATE (MgSo4) AS A TOCOLYTIC AGENT- A RANDOMIZED CONTROLLED TRIAL
Shaheed Zulfiqar Ali Bhutto Medical University
Preterm Labor
Oxytocin Versus Human Chorionic Gonadotropin as Trigger in Ovulation Induction
Shakeela Ishrat
Ovulation Induction · Polycystic Ovary Syndrome
Letrozole Alone Protocol Versus Using Letrozole and HCG Protocol
Egymedicalpedia
PCOS (Polycystic Ovary Syndrome) of Bilateral Ovaries
Can Biotin Supplementation be Used to Mask hCG Abuse?
Sports Medicine Research and Testing Laboratory
Healthy
Effects of Intrauterine Flushing With Human Chorionic Gonadotropin on ICSI Outcome
Omayma Ismail Khalaf
Female Infertility
Clinical Research Study to Learn About the Effect and Safety of Different Doses of FE 999302 When Given as a Single Dose for Final Development of the Eggs After Ovarian Stimulation
Ferring Pharmaceuticals
Infertility
Two Different Types of Luteal Phase Support in Natural Cycle Frozen Embryo Transfer and Its Effect on Pregnancy Rates
Shaare Zedek Medical Center
Luteal Phase Support
COMPARING TWO PROTOCOLS FOR FINAL OOCYTE MATURATION IN POOR RESPONDERS UNDERGOING GnRH-ANTAGONIST ICSI CYCLES
Alexandria University
Infertility
HOPE Trial hCG or Progesterone Effect on Recurrent Pregnancy Loss
Wake Forest University Health Sciences
Recurrent Pregnancy Loss Without Current Pregnancy
Comparison of Triggers in Double Ovarian Stimulation (DuoStim).
Instituto Bernabeu
IVF · LOW OVARIAN RESPONSE
Rec-LH PD and Safety Profile in Hypogonadotropic Hypogonadism Men
Azienda Ospedaliero-Universitaria di Modena
Acquired Hypogonadotropic Hypogonadism
A Randomized, Double-blinded, Clinical, Placebo-controlled Trial on the Effects of Therapy With Letrozole and hUman Choriongonadotropin in Male Hypogonadism Induced by Illicit Use of Anabolic Androgenic Steroids- The LUCAS Trial
Rigshospitalet, Denmark
Hypogonadism · Hypogonadism, Male · Hypogonadotropic Hypogonadism
Progestin-primed Ovarian Stimulation Protocol Versus GnRH Antagonist Protocol in Polycystic Ovary Syndrome Patients Undergoing IVF/ICSI Cycles
Mansoura University
PCOS (Polycystic Ovary Syndrome) of Bilateral Ovaries
Study to Assess the Effect of Intrauterine Adminstration of HCG Versus Endometrial Injury by Pipelle
Wael Elbanna Clinic
Female Infertility
Immunophenotypage of RIF and RM Patients and Intrauterine Administration of PBMC
Fertilys
Infertility, Female
Progesterone Levels During Ovulation and Luteal Phase
ART Fertility Clinics LLC
Infertility, Female
Prospective Assessment of Impact of Personalized Dosing of Low-dose Human Chorionic Gonadotropin (hCG) on in Vitro Fertilization (IVF) Outcomes
Reproductive Medicine Associates of New Jersey
Infertility, Female
Expectant Management of Ectopic Pregnancy
Ain Shams University
Ectopic Pregnancy
Different Treatment Options for Tubal Ectopic Pregnancy:- A Systmatic Review
Sohag University
Woman With Tubal Ectopic Pregnancy
Injection Free IVF
Insel Gruppe AG, University Hospital Bern
Fertility Disorders
Minimal Stimulation Protocol Using Aromek(Letrozole) and Follitrope(recFSH) Combined With INVOCell-Low Cost IVF
Galaxy Pharma (Pvt) Limited
Primary Infertility · Secondary Infertility · Low Responders · Mild to Moderate Male Factor Infertility
Normal Range of TSH and FT4 in Pregnancy
Sehit Prof. Dr. Ilhan Varank Sancaktepe Training and Research Hospital
Hypothyroidism · Pregnancy Related · Thyroid · Dysfunction
Clotting Parameters After Medical Abortion
NHS Lothian
Abortion Early · Abortion, Complete · Abortion, Second Trimester · Termination of Pregnancy Complicated by Embolism
Hormonal Stimulation of Spermatogenesis
Egymedicalpedia
Azoospermia, Nonobstructive
Freeze All on Oocyte Maturatin by Gonadotropin Agonist Versus Human Chorionic Gonadotroipin
Aljazeera Hospital
Infertility
A Proof of Concept Study of Serum Progesterone Levels for IVF/ICSI Following HCG Trigger for Oocyte Maturation
ART Fertility Clinics LLC
Infertility · Infertility, Female · IVF · hCG
A Randomized Controlled Study of Different Trigger Modes of Antagonist Regimen in Patients With Low Ovarian Reserve
Nanjing University
Poor Ovarian Response
An Open Labeled RCT on the Effect of Additional hCG Injection for LPS on Pregnancy Outcomes in IHH Patients
Fudan University
Luteal Phase Deficiency · Luteal Phase Support · Idiopathic Hypogonadotropic Hypogonadism
The Effect of Granulocyte Colony Stimulating Factor Versus Human Chorionic Gonadotropin in Females With a History of RIF
Al-Azhar University
Fertility Disorders
Human Chorionic Gonadotropin Versus Granulocyte Colony Stimulating Factor in Increasing Pregnancy Rate in ICSI
Al-Azhar University
Fertility Disorders
Effect of GnRH Agonist vs GnRH Antagonist on Oocyte Morphology in Polycystic Ovary Syndrome Patients During IVF/ICSI
Damascus University
In Vitro Fertilization · Infertility · Intracytoplasmic Sperm Injection · Polycystic Ovary Syndrome
Effect of GnRH Agonist vs GnRH Antagonist on Oocyte Morphology During IVF/ICSI
Damascus University
In Vitro Fertilization · Intracytoplasmic Sperm Injection · Infertility
Intramuscular Injection of Human Chorionic Gonadotropin in Frozen Embryo Transfer Cycles
Royan Institute
Embryo Implantation
Beta-HCG Levels in Uterine Cavity Lavage for Pregnancies of Unknown Location
Zeynep Kamil Maternity and Pediatric Research and Training Hospital
Pregnancy, Ectopic · Early Pregnancy Loss
Double Trigger in Patients With Low Proportion of Mature Oocytes
Riyadh Fertility and Reproductive Health center
Infertility, Female
Double Trigger in Patients With Low Number of Oocytes Retrieved Per Number of Preovulatory Follicles
Riyadh Fertility and Reproductive Health center
Infertility, Female
Effect of GnRH Agonist vs GnRH Antagonist on IVF/ICSI Outcomes.
Damascus University
In Vitro Fertilization · Intracytoplasmic Sperm Injection · Infertility
Effect of GnRH Agonist vs GnRH Antagonist on IVF/ICSI Outcomes in Polycystic Ovary Syndrome Patients.
Damascus University
In Vitro Fertilization · Intracytoplasmic Sperm Injection · Infertility · Polycystic Ovary Syndrome
Clinical Investigation for the Preview® hCG Urine/Serum Combo Pregnancy Test
Guangzhou Wondfo Biotech Co., Ltd
Pregnancy
B-HCG Levels in Women Diagnosed With Retained Products of Conception
Assaf-Harofeh Medical Center
Retained Products of Conception
Developing a Controlled Human Infection Model for Group B Streptococcus (CHIM_GBS)
St George's, University of London
Group B Streptococcus
Relative Contributions of Predictors of Hyperandrogenism in Older vs. Young Women With PCOS
University of Virginia
Polycystic Ovary Syndrome
GnRH Agonist for Dual Trigger in IVF and for Luteal Phase Support in FET
The University of Hong Kong
Subfertility
ITT-5 Mechanisms of Spermatogenesis in Man
University of Washington
Gonadotropin Deficiency
Dual Trigger" in IVF Patients at High Risk of Ovarian Hyper Stimulation Syndrome
Mount Sinai Hospital, Canada
Ovarian Hyperstimulation Syndrome · Infertility, Female
Effects of Intramural Fibroids on IVF Outcome
Cairo University
Infertility, Female · Assisted Reproduction
Timing and Intrauterine Insemination in Unexplained Infertility
Sohag University
Intrauterine Insemination
The Value of Myomectomy in Women With Intramural Myoma Before IVF.
Cairo University
Fibroid Uterus · IVF
Effect of Intrauterine Injection of HCG on Clinical Pregnancy Outcome in Repeated Implantation Failure Patients
Reproductive & Genetic Hospital of CITIC-Xiangya
Infertility
Comparative Bioavailability Study of Human Chorionic Gonadotropin (hCG)-IBSA Versus a Marketed hCG Formulation
IBSA Institut Biochimique SA
Infertility
The Accuracy of Endometrial Ultrasound to Predict Implantation
University of Nottingham
Infertility, Subfertility
Efficacy and Safety of Long Term Use of hCG or hCG Plus hMG in Males With Isolated Hypogonadotropic Hypogonadism (IHH)
Tongji Hospital
Isolated Hypogonadotropic Hypogonadism · Kallmann Syndrome · Infertility
Booster Dose of HCG for Unruptured Follicle in Non IVF/ICSI Cycles
Tanta University
LUF - Luteinised Unruptured Follicle Syndrome
Dual Trigger in the Final Oocyte Maturation in Poor Ovarian Responders
American University of Beirut Medical Center
Poor Ovarian Reserve
Effect of Intrauterine Injection of Hcg Before ET on Clinical Outcomes in IVF/ICSI Cycles
Assiut University
Infertility · ART
Follicle Size and Oocyte Development
Sheba Medical Center
IVF Treatment
Low-dose HCG as an Adjunct to Ovarian Stimulation in Subfertile Women Undergoing ART
National and Kapodistrian University of Athens
HCG; IVF; Pregnancy Rates; ART; Chorionic Gonadotropin
Effect of Longer-term Adrenal Suppression Using Low Dose Hydrocortisone on Androgen Overproduction
University of Virginia
Hyperandrogenemia · Obesity · Polycystic Ovary Syndrome
Endometrial Preparation in Frozen Embryo Transfer Cycles
Meir Medical Center
Reproductive Behavior
Long-term Endogenous Androgen Priming in Bologna Criteria Poor Responder Patients - A Pilot Study
Mỹ Đức Hospital
Poor Ovarian Response
Transfer of Frozen Embryos in Natural Cycle: Evaluation of Impact of Spontaneous Versus HCG-triggered Ovulation on Pregnancy Rate
Centre Hospitalier Universitaire de Nīmes
in Vitro Fertilization
Intrauterine Injection of Human Chorionic Gonadotrophin and Pregnancy Rate in ICSI
Ain Shams University
Repeated Implantation Failure
In Vitro Fertilization Impact on Metabolic Parameters
University of Warwick
GDM · Insulin Resistance · Glucose Intolerance · PCOS
Comparative Study on the Efficacy of Ovarian Stimulation Protocols on the Success Rate of ICSI in Female Infertility
Lebanese University
Female Infertility · Female Infertility Due to Ovulatory Disorder · Premature Ovarian Failure · Polycystic Ovary Syndrome
Extragonadal Effects of hCG on Calcium Homeostasis
Martin Blomberg Jensen
Hypogonadism · Calcium Disorder · Renal Disease
Effect of Endometrial Injury in Couples With Unexplained Infertility
Cairo University
Unexplained Infertility
Success Rate Natural Cycles Versus Modified Natural Cycles in Frozen Embryos
Acibadem University
Infertility, Female
Agonist Versus Classical HCG Trigger (Poor Responders, Normoresponders and High Responders)
Ginegorama S.L.
Ovulation Induction · In Vitro Fertilization (IVF) · Infertility, Female · Oocytes
Effectiveness of Estradiol Valerate Pretreatment in Antagonist Protocol for Poor Ovarian Response Patient
Reproductive & Genetic Hospital of CITIC-Xiangya
Infertility
Relationship Between Some Vitamins and Antioxidants With in Vitro Fertilization Outcomes
Damascus University
In Vitro Fertilization · Infertility
Effect of Intrauterine Injection of HCG on Pregnancy Outcome in Repeated Implantation Failure Patients
Reproductive & Genetic Hospital of CITIC-Xiangya
Infertility
The Use of Quantitative Pregnancy Test in Amniotic Fluid as a Diagnostic Tool for Rupture of Fetal Membranes
Cairo University
Premature Rupture of Membrane
Calciotropic Effects After HCG Stimulation Test
Martin Blomberg Jensen
Hypogonadism, Male
Endometrium Immunomodulation by in Utero Administration of Peripheral Blood Mononuclear Cells
Fertilys
Infertility
Clinical Study of Recombinant Human Follitropin for Injection Assisted in COH Assisted IVF-ET
Changchun GeneScience Pharmaceutical Co., Ltd.
Ovarian Hyperstimulation Syndrome
Universal warming protocol
GynePro Medical
Warming cryopreserved human oocytes
Efficacy and Safety of Corifollitropin Alfa (MK-8962) in Combination With Human Chorionic Gonadotropin (hCG) in Adolescent Males With Hypogonadotropic Hypogonadism (HH) (MK-8962-043)
Organon and Co
Hypogonadotropic Hypogonadism
Frozen-thawed Embryo Transfer in a Natural Cycle: hCG Triggering Versus LH Home Test
Tampere University Hospital
Infertility
Extending the hCG OPU Interval
The Baruch Padeh Medical Center, Poriya
Infertility
Low Dose GnRHa Early Luteal Phase Down Regulation Versus GnRHa Ultra-short Protocol for Poor Ovarian Response
Navy General Hospital, Beijing
Subfertility, Female · Ovulation Disorder
Agonist Trigger With HCG Luteal Supplementation vs HCG Trigger With Progesterone Luteal Supplementation in Antagonist Controlled HyperstimulationCycle
Ain Shams University
Infertility, Female
Combination of Gonadotropin-releasing Hormone Agonist and Human Chorionic Gonadotropin Triggered by Normal Responder in GnRH-antagonist Cycles
Tel-Aviv Sourasky Medical Center
In-vitro Fertilization
Role of Aromatase Inhibitor to Enhance Ovulation in Poor Responder During Induction With Short Antagonist Protocol in Cases of ICSI
Minia University
Infertility Indicated for ICSI
Human Menopausal Gonadotropin Combining With Human Chorionic Gonadotropin Treat Congenital Hypogonadotropic Hypogonadism
Beijing Children's Hospital
Kallmann Syndrome · Hypogonadotropic Hypogonadism
Comapring Luteal Phase Support in IVF Patients Who Are at High Risk for Developing OHSS
Meir Medical Center
Infertility
Comparative Study Between Single Versus Dual Trigger for Poor Responders in GnRH-antagonist ICSI Cycles
Cairo University
Assisted Reproduction
Protocol to Minimize Injections and Blood Draws for Women Undergoing in Vitro Fertilization
New Hope Fertility Center
Infertility
Pregnancy Outcome of Women Using Low Molecular Weight Heparin Before Frozen-thawed Embryo Transfer
Nanfang Hospital, Southern Medical University
Infertility
Modified Luteal Support for Frozen-Thawed Embryo Transfer - A Prospective Study
Sheba Medical Center
Embryo Transfer · Luteal Support
Dual Trigger Versus GnRHa Trigger Combined With Luteal HCG Administration
Mansoura University
Infertility
GnRH Agonist Versus hCG Trigger in Ovulation Induction With Intrauterine Insemination.
Hue University of Medicine and Pharmacy
Ovulation Induction
A Randomised Trial Using Highly Purified Human Chorionic Gonadotropin (HP-hCG) and Recombinant Human Chorionic Gonadotropin (rhCG) in Women Undergoing Controlled Ovarian Stimulation
Ferring Pharmaceuticals
Infertility
Study of Pregnyl as Adjunct Therapy for High-Risk or Refractory Acute GVHD
Masonic Cancer Center, University of Minnesota
Graft vs Host Disease
Use of Low Dose of HCG During Ovulation Induction With CC in Women With CC Resistant PCOS
Mohamed Sayed Abdelhafez
Infertility · Polycystic Ovarian Syndrome
Co Administration of GnRH Agonist and hCG for Final Oocyte Maturation
Mount Sinai Hospital, Canada
Infertility
Effectiveness and Safety Study of Fixed Versus Flexible of Gonadotropin-releasing Hormone Antagonist Protocol
Chong Qing Reproducive and Genetic Institute
Infertility
The Effects of Intrauterine Infusion of hCG at the Time of Embryo Transfer
Mahidol University
Infertility
GnRHa Combined With hCG and hMG for Treatment of Patients With Non-obstructive Azoospermia
Jinling Hospital, China
Azoospermia
Letrozole Versus Clomiphene Citrate for Ovulation Induction in Women With Poly Cystic Ovary Syndrome ( PCOS )
mostafa gomaa hamid halawa
Anovulation · Polycystic Ovary Syndrome
Prediction of Preterm Labor in Asymptomatic High Risk Women
Zagazig University
Preterm Labor
Three Small Doses of HCG Versus Booster Dose of HCG on Ovum Pickup Day
Cairo University
Infertility
Dual Trigger Versus Booster Dose of HCG
Cairo University
Infertility
IVF Treatment in Women With Immature Oocytes in Previous Cycle
Sheba Medical Center
Infertility
The Impact of Body Weight on Reproductive Outcomes in Poor Ovarian Responders in ICSI Cycles
Cairo University
Invitro Fertilization
Timing of HCG Administration in IUI Cycles
Mohamed Ibrahem Eid
Infertility
Intrauterine Injection of Human Chorionic Gonadotropin Injection (hCG) Before Embryo Transfer on Pregnancy Outcomes in Frozen Embryo Transfer Cycles.
Royan Institute
Infertility
The Exogenous Progesterone Free Luteal Phase After GnRHa Trigger - a Pilot Study in Normo-responder IVF Patients
Peter Humaidan
Infertility
Dual Triggering in Patients With a High Immature Oocyte Rate
IVI Madrid
INFERTILITY
A RCT Comparing Spontaneous Natural Cycles and Human Chorionic Gonadotrophin-induced Natural Cycles in FET
The University of Hong Kong
Subfertility · Pregnancy
Human Chorionic Gonadotrophin & Trigger
Cairo University
Ovulation Disorder
Intrauterine Injection of Human Chorionic Gonadotropin Before Embryo Transfer in Women With Previous IVF Failure
Mansoura University
Infertility · Invitro Fertilization
Ovulation Trigger With hCG Compared to GnRH Agonist in Patients With Repeated IVF Failures
Rambam Health Care Campus
Infertility
Elonva in Combination With Hp-FSH Versus Elonva With Low Dose hCG
AZ Jan Palfijn Gent
Infertility
Evaluation of Priming Before in Vitro Maturation for Fertility Preservation in Breast Cancer Patients
Hôpital Jean Verdier
Fertility Preservation · Breast Cancer
Administration of Follicle-stimulating Hormone (FSH) and Low Dose Human Chorionic Gonadotropin (hCG) for Oocyte Maturity While Decreasing hCG Exposure in In Vitro Fertilization (IVF) Cycles
University of California, San Francisco
Infertility
Uterine Flushing With Human Chorionic Gonadotrophin and Unexplained Infertility
Ahmed Walid Anwar Murad
Unexplained Infertility
Dual FSH/HCG Trigger in Letrozole Stimulated Intrauterine Insemination Cycles in Women With Unexplained Infertility
Benha University
Unexplained Infertility
Implantation Enhancement by Elective Cryopreservation of All Viable Embryos
Universitair Ziekenhuis Brussel
Infertility · OHSS
Ovarian Morphology and Theca Cell Androgen Production in Women With Polycystic Ovary Syndrome (PCOS)
University of California, San Diego
Polycystic Ovary Syndrome
An Efficacy and Safety Study of Corifollitropin Alfa (MK-8962) in Contrast to Recombinant FSH for Use in Controlled Ovarian Stimulation of Indian Women (P07056, Also Known as MK-8962-029)
Organon and Co
Infertility
Sperm Retrieval Rates in Non-obstructive Azoospermic Men Subjected to Gonadotropin Therapy
ANDROFERT - Clinica de Andrologia e Reproducao Humana
Non-obstructive Azoospermia · Hormone Deficiency · Hypogonadism, Male · Male Infertility
Phase 3 Study to Evaluate the Efficacy and Safety of Pergoveris® in Assisted Reproductive Technology (ESPART)
Merck KGaA, Darmstadt, Germany
Infertility
Optimal Planning of a Day 3 Cryopreserved(Frozen)-Thawed Embryo Transfer in a Natural Cycle With hCG Administration or After Spontaneous LH Peak?
Universitair Ziekenhuis Brussel
Supervision of Pregnancy Resulting From In-vitro Fertilization
Trial evaluating the influence of morphology and developmental rate on euploid blastocysts ongoing implantation rate
Genera Centre for Reproductive Medicine (Italy)
Infertility in females undergoing PGS cycles
Exploring the Role of At-home Semi-quantitative Pregnancy Tests for Follow-up to Menstrual Regulation Service
Gynuity Health Projects
Menstrual Regulation
Semi-quantitative Pregnancy Test to Monitor hCG Levels After Assisted Fertility Treatment
Gynuity Health Projects
Embryo Transfer · Intrauterine Insemination (IUI)
The Effect of a Dual Trigger on Intracytoplasmic Sperm Injection (ICSI) Reproductive Outcomes
Antalya IVF
Pregnancy · Ovarian Hyperstimulation Syndrome
Effect of Treatment With Corifollitropin Alpha in Vitro Fertilization in Patients With Poor Ovarian Response.
Instituto de Investigacion Sanitaria La Fe
Infertility
Testing the Accuracy of a Personal Heart Rhythm Monitor to Detect Prolonged Paroxysmal Atrial Fibrillation
University of Surrey
Paroxysmal Atrial Fibrillation · Stroke
Biosimilarity Study of IM Injection of Human Chorionic Gonadotrophin After Parenteral Administration of Treatment A TEST Product Epifasi 5000 I.U. Ampoules (EIPICO PHARMA, EGYPT) and Treatment B REFERENCE Product Pregnyl 5000 I.U. Ampoules (Baxter Pharmaceutical Solutions for Organon, USA).
Genuine Research Center, Egypt
Infertility, Female
Intrauterine Injection of HCG and Implantation Rate
Assaf-Harofeh Medical Center
Pregnancy Rate · Implantation Rate
Human Chorionic Gonadotrophin in an Antagonist Protocol
Cairo University
Infertility
Phase 3 Trial to Evaluate the Efficacy and Safety of COL-1620 Vaginal Progesterone Gel
Merck KGaA, Darmstadt, Germany
Luteal Hormone Supplementation in In-vitro Fertilization · Embryo Transfer
Injection of Hormone to Enhance Implantation in Embryo Transfer After IVF
Servy Massey Fertility Insititute
Infertility
Effectiveness of Pregnancy Tests as an Assessment Tool to Identify Continuing Pregnancy
Gynuity Health Projects
Medical Abortion
Comparison Between Recombinant Versus Urinary hCG for Ovulation Induction in High Responders
Eugonia
Infertility
Feasibility and Acceptability of Using the Semi-quantitative Pregnancy Test in an Assisted Fertility Setting
Gynuity Health Projects
Embryo Transfer
Poor Ovarian Stimulation Response in In Vitro Fertilization (IVF) Program
Cairo University
Infertility
Using a Personal Heart Rhythm Monitor to Diagnose Paroxsymal Atrial Fibrillation in the Community
University of Surrey
Paroxysmal Atrial Fibrillation · Stroke
Co-administration of Low Dose hCG at the Time of GnRH Agonist Trigger or 35 Hours Later for the Prevention of OHSS
UConn Health
Ovarian Hyperstimulation Syndrome
A Study of the Efficacy and Safety of Corifollitropin Alfa (MK-8962) in Combination With Human Chorionic Gonadotropin (hCG) in Adult Men With Hypogonadotropic Hypogonadism (HH) (P07937)
Organon and Co
Hypogonadism · Hypogonadotropic Hypogonadism
Study of Dual Trigger Ovulation in Oocyte Donors
Weill Medical College of Cornell University
Infertility
Effect of hCG on Receptivity of the Human Endometrium
Michigan State University
Infertility · Subfertility
Sofia hCG FIA Field Study
Quidel Corporation
Pregnancy, Early Detection
Prediction of Metaphase II Oocytes According to Different Levels of Serum AMH in Poor Responders Using the Antagonist Protocol
Cairo University
Invitro Fertilizaion
Trial to Assess the Clinical Efficacy and Safety of MSJ-0011 in Inducing Ovulation in Anovulatory or Oligo-ovulatory Japanese Women
Merck KGaA, Darmstadt, Germany
Anovulation · Oligo-ovulation · Hypothalamic-pituitary Dysfunction · Polycystic Ovarian Syndrome
Frozen Embryo Transfer in Natural and Hormonal Replacement Cycles
Royan Institute
Infertility
Vaginal Progesterone Supplementation in Women With PCOS Undergoing Ovulation Induction With Letrozole
Eastern Virginia Medical School
Polycystic Ovary Syndrome
Dual Trigger to Reduce Ovarian Hyperstimulation Syndrome
Chenshiling
Infertility and at High Risk of OHSS
Intrauterine Human Chorionic Gonadotropin at the Time of Embryo Transfer
Reproductive Medicine Associates of New Jersey
Control Media Only · Study hCG and Media
A Trial to Compare the Efficacy and Safety of Ovarian Stimulation With GONAL-f® and Luveris® Starting on Day 1 Versus Day 6 in Women Undergoing Assisted Reproductive Technique
Merck KGaA, Darmstadt, Germany
Infertility · Fertility · Follicle Stimulating Hormone Deficiency
Gene Expression Profile After Gonadotropin Releasing Hormone (GnRH) Agonist Trigger of Oocyte Maturation
UConn Health
Endometrial Receptivity · Ovarian Hyperstimulation Syndrome
Clinical Trial Comparing the Efficacy and Safety of DA-3803 and Ovidrel
Dong-A Pharmaceutical Co., Ltd.
Hyperovulation Induction for Assisted Reproduction Treatment
Human Chorionic Gonadotropin Stimulation Effects on Steroidogenesis in Men With Klinefelter Syndrome
Azienda USL Modena
Steroidogenesis · Klinefelter Syndrome · Human Chorionic Gonadotropin (hCG) Stimulation
Metformin for the Treatment of Unexplained Oligozspermia
The Egyptian IVF-ET Center
Infertility
Natural Cycles With Spontaneous Versus Induced Ovulation in FET
Istituto Clinico Humanitas
Embryo Transfer
Synchronization of Ovarian Stimulation for in Vitro Fertilization With Follicular Wave Emergence
University of Sao Paulo General Hospital
Infertility
The Effects of Two Endometrium Preparation Protocols in Frozen-thawed Embryo Transfer in Women With Irregular Cycles
Sun Yat-Sen Memorial Hospital of Sun Yat-Sen University
Infertility
HCG (Human Chorionic Gonadotropin) Priming for Thin Endometrium in IVF (in Vitro Fertilization)
Universitair Ziekenhuis Brussel
Endometrial Thickness · Pregnancy Outcome
The Luteal Phase After GnRHa Trigger - a Proof of Concept Study
Regionshospitalet Viborg, Skive
Progesterone Levels · Infertility
Trial Comparing hCG Triggering Versus hCG Associated With GnRH Agonist
AZ Jan Palfijn Gent
Infertility
Endometrial Receptivity After GnRH Agonist Triggering
IVI Madrid
Ovarian Hyperstimulation Syndrome
Trial comparing blastocyst transfer with cleavage stage transfer in women with increased maternal age
GENERA Centre for Reproductive Medicine (Italy)
Infertility in females aged between 36 and 42 years
Optimal rhCG(Ovidrel®) Dose in Poor Responder During IVF and ICSI Cycles
Seoul National University Hospital
in Vitro Fertilization · Poor Responder
Theca Cell Function in Adolescents With Polycystic Ovary Syndrome (PCOS)
University of California, San Diego
PCOS
Comparison of Telephone Follow-up With In-person Follow-up After Medical Abortion
Women's College Hospital
Medical; Abortion, Fetus
PERgoveriS In Stratified Treatment for Assisted Reproductive Technique
Merck KGaA, Darmstadt, Germany
Assisted Reproductive Techniques · Reproductive Technology, Assisted
Muscle-Sparing Effect Of Human Chorionic Gonadotropin (hCG) During a Very Low Calorie Diet (VLCD)
Dr. Emma's Corporation
HCG
Ovarian Contribution to Androgen Production in Adolescent Girls
University of Virginia
Polycystic Ovary Syndrome · Obesity · Hyperandrogenism
Use of High Cost Monitoring During Letrozole Ovulation Induction
University of Michigan
Infertility
The Effects of Gonadotropin Replacement Therapy in Patients With Hypogonadism
Gulhane School of Medicine
Idiopathic Hypogonadotropic Hypogonadism
Safety Study of Human Chorionic Gonadotropin (hCG) and Epoetin Alfa (EPO) in Traumatic Brain Injury: Dosing Tier 1
University of Calgary
Traumatic Brain Injury
Comparing the Efficacy of Urinary and Recombinant Human Chorionic Gonadotropin (hCG) on Oocyte Maturity
Royan Institute
In Vitro Fertilization
Progesterone Serum Levels in Subfertile Female Patients Undergoing in Vitro Fertilisation (IVF)
Ferring Pharmaceuticals
Infertility
Preimplantation Genetic Diagnosis (PGD) With Gonadotropin-releasing Hormone (GnRH) Agonist Versus Antagonist
Universitair Ziekenhuis Brussel
Reproductive Endocrinology · Fertility · Optimal Stimulation Protocol
A Study to Evaluate the Tolerability, Safety and Pharmacokinetic Characteristics of DA-3803
Dong-A Pharmaceutical Co., Ltd.
Infertility · Induction of Ovulation
Effects of Gonadotropin Replacement Therapy on Metabolic Parameters in Patients With Hypogonadism
Gulhane School of Medicine
Idiopathic Hypogonadotropic Hypogonadism
Efficacy and Safety of Pulsatile Gonadotropin Releasing Hormone Pump Treatment in Patients With Idiopathic Hypogonadotropic Hypogonadism
Shanghai Jiao Tong University School of Medicine
Idiopathic Hypogonadotropic Hypogonadism
Coenzyme Q10 and Clomiphene Citrate (CC) for Ovulation Induction in Polycystic Ovary Syndrome
Mansoura University
Polycystic Ovary Syndrome
Response of VEGF and AT-II to HCG in PCOS
Nanjing University School of Medicine
Polycystic Ovary Syndrome
To Describe the Effect of rhLH Supplementation in Women With Hyporesponse to rhFSH After Pituitary Downregulation
Peking University Third Hospital
Infertility
Is the IVF Outcome Dependent on the Time Interval Between hCG Administration and Oocyte Retrieval?
Aristotle University Of Thessaloniki
Subfertility
Efficacy of Low Dose hCG on Oocyte Maturity in Poor Responder Women Undergoing Intracytoplasmic Sperm Injection
Royan Institute
Infertility
Study to Examine Effect of Recombinant Luteinizing Hormone (r-Lh) and Recombinant Human Chorionic Gonadotropin (r-hCG) for Ovarian Stimulation in Assisted Reproduction Techniques (ART)
Regionshospitalet Viborg, Skive
Controlled Ovarian Stimulation · Infertility
Sequential Therapy for Hypogonadotropic Hypogonadism
Shanghai Jiao Tong University School of Medicine
Hypogonadotropic Hypogonadism · Kallmann Syndrome
Mechanisms of Increased Androgen Production Among Women With Polycystic Ovary Syndrome
University of California, San Diego
Polycystic Ovary Syndrome
REGENESIS (US): A Phase IIb Prospective, Randomized, Double-blind, Placebo Controlled Study of NTx™-265: Human Chorionic Gonadotropin (hCG) and Epoetin Alfa (EPO) in Acute Ischemic Stroke Patients
Stem Cell Therapeutics Corp.
Stroke
Comparison of Micro-dose Human Chorionic Gonadotropin (hCG) With Human Menopausal Gonadotropin (HMG) in Polycystic Ovary Syndrome
Royan Institute
Endocrine System Diseases · Gonadal Disorders
Study of NTx®-265: Human Chorionic Gonadotropin (hCG) and Epoetin Alfa (EPO) in Acute Ischemic Stroke Patients
Stem Cell Therapeutics Corp.
Stroke
HCG Versus Spontaneous LH in Intrauterine Insemination (IUI ) Cycles
Universitair Ziekenhuis Brussel
Spontaneous Triggering of Ovulation vs. Administration of Human Chorionic Gonadotropin in Patients Undergoing IUI
HOP-3 Manipulation of the Intratesticular Hormonal Milieu With Exogenous Testosterone
University of Washington
Healthy Males
Frozen Blastocyst Transfer in Natural Cycle
Universitair Ziekenhuis Brussel
Infertility
Supplementation With Human Chorionic Gonadotropin (hCG) During Controlled Ovarian Stimulation With Recombinant Follicle-stimulating Hormone (FSH) for In Vitro Fertilisation
Rigshospitalet, Denmark
Infertility
Pregnancy Rate by HCG Administration Versus Urinary LH Surge Method in Patients Undergoing IUI
Shiraz University of Medical Sciences
Pregnancy
Triggering of Final Oocyte Maturation With GnRHa (Buserelin) in GnRH Antagonist Cycles
Regionshospitalet Viborg, Skive
OHSS (Ovarian Hyperstimulation)
Evaluation of the Luteolytic Effect of a Gonadotropin Releasing Hormone (GnRH) Agonist After the Administration of Human Chorionic Gonadotropin (hCG) in the Initial Follicular Phase a Its Influence on the Prognosis of in Vitro Fertilization Treatment
University of Sao Paulo
Infertility
Prevention of Breast Cancer: As Simple as hCG-A Randomized Clinical Trial in High Risk Women
New York Presbyterian Hospital
Breast Cancer
Analysis of Two Therapeutic With Cetrotide® in Polycystic Ovarian (PCO) Women in Assisted Reproductive Technology (ART)
Merck KGaA, Darmstadt, Germany
Polycystic Ovarian Syndrome
Human Chorionic Gonadotropin (hCG) Priming Prior to Controlled Ovarian Hyperstimulation (COH) in Poor Responder In Vitro Fertilization (IVF) Patients
IVI Madrid
Ovarian Response
Replacement of Fresh Embryo Transfers (ETs) by Frozen Embryo Transfers (FETs) Using Vitrification
Yazd Research & Clinical Center for Infertility
In Vitro Fertilization
EXpression PRofile Endometrium Samples Study
Merck KGaA, Darmstadt, Germany
In Vitro Fertilization
Recombinant Human Chorionic Gonadotropin in Preventing Breast Cancer in Premenopausal Women With BRCA1 Mutations
Fox Chase Cancer Center
BRCA1 Mutation · Breast Cancer
Human Chorionic Gonadotropin (hCG) Test: A Novel Method to Evaluate the Ovarian Reserve
Hadassah Medical Organization
Infertility
Pregnancy and Neonatal Follow-up of Ongoing Pregnancies Established in Clinical Trial P05693 (P05713)
Organon and Co
Pregnancy · Neonates
REGENESIS (CA): A Study of NTx™-265: Human Chorionic Gonadotropin (hCG) and Epoetin Alfa (EPO) in Acute Ischemic Stroke Patients
Stem Cell Therapeutics Corp.
Stroke
Effects of Medications in Patients With Hypogonadism
Gulhane School of Medicine
Idiopathic Hypogonadotropic Hypogonadism
AS900672-Enriched in Ovulation Induction
Merck KGaA, Darmstadt, Germany
Ovulation Induction
A Phase II Study to Assess the Efficacy and Safety of Luveris® (Lutropin Alfa) in Mid Follicular Phase for Controlled Ovarian Stimulation (COS) in Advanced Reproductive Age
Merck KGaA, Darmstadt, Germany
Infertility · Ovulation Induction
Theca Cell Function in Women With Polycystic Ovary Syndrome (PCOS)
University of California, San Diego
Polycystic Ovary Syndrome
Low Dose hCG in the Late Follicular Phase
Universitair Ziekenhuis Brussel
Infertility
A Phase 2 Trial to Evaluate if Corifollitropin Alfa (Org 36286), Followed by a Low Daily Dose of hCG or Recombinant FSH Can Induce Monofollicular Growth in Women With WHO Group II Anovulatory Infertility (P05693)
Organon and Co
Ovulation Induction
Pregnancy and Neonatal Follow-up of Ongoing Pregnancies Established in Clinical Trial P05690 (Care Program) (P05710)
Organon and Co
Pregnancy · Neonates
Pregnancy and Neonatal Follow-up of Ongoing Pregnancies Established in Clinical Trial P05714 (Care Program)(P05715)
Organon and Co
Pregnancy · Neonates
Synchronization of Follicle Wave Emergence and Ovarian Stimulation
University of Saskatchewan
Infertility
Modified Natural Cycle Offers a Chance of Pregnancy in Patients With Poor Response and High Basal FSH
Eugonia
Infertility · Premature Ovarian Failure
Investigation of a Long-Acting Follicle Stimulating Hormone in Infertile Women Undergoing Assisted Reproductive Technology (ART)
Merck KGaA, Darmstadt, Germany
Infertility
To Investigate Efficacy and Safety of a Single Injection of Org 36286 for Ovarian Stimulation Using Daily Recombinant FSH as Reference (Ensure)(P05690/MK-8962-001)
Organon and Co
Infertility
Follow-up Protocol on the Outcome of Frozen-thawed Embryo Transfer Cycles From Clinical Trial P05690 (P05711)
Organon and Co
In Vitro Fertilization
hCG Supplementation in Frozen-Thawed Embryo Transfer Cycle
Hadassah Medical Organization
Fertility Agents, Female
Frozen Embryo Transfer (FET) in Natural Cycles or in Natural Cycles Controlled by Human Chorionic Gonadotropin (hCG) Administration
Universitair Ziekenhuis Brussel
Infertility
Corifollitropin Alfa in Participants Undergoing Repeated Controlled Ovarian Stimulation (COS) Cycles Using a Multiple Dose Gonadatropin Releasing Hormone (GnRH) Antagonist Protocol (Study 38825)(P05714)
Organon and Co
In Vitro Fertilization
Pregnancy and Neonatal Follow-up of Ongoing Pregnancies Established in Clinical Trial P05787 (P05712)
Organon and Co
Pregnancy · Neonates
A Study to Investigate the Efficacy and Safety of a Single Injection of Corifollitropin Alfa (Organon 36286) for Ovarian Stimulation Using Daily Recombinant Follicle Stimulating Hormone (FSH) as Reference (P05787)
Organon and Co
In Vitro Fertilization
Follow-up Study of Frozen-thawed Embryo Transfer (FTET) Cycles After Cryopreservation of Embryos in Clinical Trial P05787 (P05716)
Organon and Co
In Vitro Fertilization
Pregnancy and Neonatal Follow-up of Ongoing Pregnancies Established in Clinical Trial 38833 (P05783)
Organon and Co
Pregnancy · Neonates
Luveris® (Lutropin Alfa for Injection) in Women With Hypogonadotropic Hypogonadism (Luteinizing Hormone [LH] Less Than [<] 1.2 International Unit Per Liter [IU/L])
EMD Serono
Hypogonadotropic Hypogonadism
Lutropin Alfa in Women at Risk of Poor Response
Merck KGaA, Darmstadt, Germany
Ovarian Stimulation
Clinical Tolerance and Equivalence of hCG-IBSA vs Recombinant Human Chorionic Gonadotrophin in Women Undergoing In Vitro Fertilisation
IBSA Institut Biochimique SA
Infertility
Pregnancy Rates in IVF After Ovulation Triggering With Recombinant or Urinary Human Chorionic Gonadotrophin (HCG)
Universitair Ziekenhuis Brussel
Embryonic Development · Pregnancy · VEGF
Endometrial Advancement After Rec or u-HCG Triggering
Universitair Ziekenhuis Brussel
Infertility
Safety and Efficacy of Pre-defined, Fixed Dose of Gonal-f Pen Based on Subject Baseline Characteristics in Subjects Undergoing in Vitro Fertilization (IVF)
Merck KGaA, Darmstadt, Germany
Infertility
A Phase 3b Study to Evaluate Subject Satisfaction With Follitropin Alfa Injection in Oligoanovulatory Infertile Women Undergoing Ovulation Induction
EMD Serono
Infertility
A Study Using Recombinant Human Luteinizing Hormone (r-hLH, Luveris®) in the Treatment of Chinese Women With Hypogonadotropic Hypogonadism
Merck KGaA, Darmstadt, Germany
Hypogonadism
A Study Using Recombinant Human Chorionic Gonadotrophin (rhCG, Ovidrel®) in the Induction of Final Follicle Maturation and Early Luteinization in Chinese Women Undergoing in Vitro Fertilization and Embryo Transfer (IVF/ET)
Merck KGaA, Darmstadt, Germany
Infertility
An Open Label, Canadian Phase IIIb Study With Ovidrel in Ovulation Induction (OI) and Assisted Reproductive Technique (ART)
EMD Serono
Ovulation Induction · Infertility
Comparison Between hCG and GnRH Agonist for Ovulation Induction in Patients With High Response to IVF Drugs
Eugonia
Infertility
A Study to Compare the Safety and Efficacy of Cetrotide® 3 Milligram (mg) Versus Antagon™ in Women Undergoing Ovarian Stimulation
EMD Serono
Infertile Women Undergoing Assisted Reproductive Technology (ART)
Investigate Dose of Org 36286 to Initiate Multiple Follicular Growth in a Controlled Ovarian Hyperstimulation Protocol for IVF or IVF/ICSI (P07015)
Organon and Co
Infertility · In Vitro Fertilization
Provocative Testing Using LHRH and hCG of the Pituitary-Gonadal Axis in Persons With Spinal Cord Injury.
US Department of Veterans Affairs
Hypogonadism · Spinal Cord Injury
A Study to Evaluate Safety and Efficacy of Recombinant Human Luteinizing Hormone (r-hLH) Compared With Urinary Human Chorionic Gonadotrophin (u-hCG) to Trigger Ovulation in Infertile Women
Merck KGaA, Darmstadt, Germany
Infertility
MATES Study
Martin-Luther-Universitaet Halle-Wittenberg
Male Infertility
Sources: ClinicalTrials.gov, the EU Clinical Trials Information System and ISRCTN, deduplicated so a study registered in more than one registry is counted once. A study is listed when Human Chorionic Gonadotropin (HCG) is named as an intervention. A registered trial is a plan, not a result — registration says nothing about whether the peptide worked.