| Withdrawn | A Study to Measure Pharmacokinetic (PK) Concentrations of Gonadotropin-Releasing Hormone Delivered by the Omni NCT07152730 | Ferring Pharmaceuticals | Phase 1 |
| Recruiting | Treatment of Menstrual Cycle Alterations in Adolescents NCT06800170 | Lo.Li.Pharma s.r.l | N/A |
| Completed | Evaluation of Bone Mineral Density Indications and Outcomes in Female Adolescents: Implications for Early Dete NCT07164248 | Bagcilar Training and Research Hospital | — |
| Recruiting | Observation of Environment and Reproductive-Endocrine Effects NCT06280807 | National Institute of Environmental Health Sciences (NIEHS) | — |
| Unknown | Psychological Impact of Amenorrhea in Women With Endometriosis NCT02393482 | University of Cagliari | Phase 4 |
| Recruiting | Retrospective Observational Evaluation of the Bone Mineral Density Outcome in Young Women With Amenorrhea NCT07015476 | IRCCS Azienda Ospedaliero-Universitaria di Bologna | — |
| Recruiting | Ovarian Morphology in Girls NCT04424576 | Cornell University | — |
| Completed | Mental Health in Fitness Instructors NCT04135729 | Norwegian School of Sport Sciences | — |
| Recruiting | Autologous PRP Intra Ovarian Infusion to Restore Ovarian Function in Menopausal Women NCT03916978 | Genesis Athens Clinic | Phase 2 / Phase 3 |
| Completed | Effect of Intense Training on Ovarian Function and Bone Turnover NCT02224976 | USDA, Western Human Nutrition Research Center | N/A |
| Completed | Evaluation of Ovarian Morphology and Function in Overweight Women During Weight Loss NCT01785719 | Cornell University | N/A |
| Recruiting | Inherited Reproductive Disorders NCT01500447 | National Institute of Environmental Health Sciences (NIEHS) | — |
| Completed | Hormonal Regulation of Puberty and Fertility NCT01511588 | National Institute of Environmental Health Sciences (NIEHS) | — |
| Completed | Ultrasound Characterization of Ovarian Follicle Dynamics in Women With Amenorrhea NCT01927432 | Cornell University | — |
| Withdrawn | Efficacy and Safety of Metformin in Preventing Patients With Risperidone From Weight Gain and Amenorrhea NCT01423487 | Central South University | N/A |
| Completed | Determination of the Lowest, Safe and Effective Dose of Proellex NCT01187043 | Repros Therapeutics Inc. | Phase 1 / Phase 2 |
| Completed | Study of Leptin for the Treatment of Hypothalamic Amenorrhea NCT00130117 | Beth Israel Deaconess Medical Center | Phase 2 |
| Unknown | Ethinyl Estradiol and Cyproterone Acetate in Irregular Menstruation NCT01103518 | Fundação Educacional Serra dos Órgãos | Phase 4 |
| Terminated | Study to Evaluate Menses Induction in Women Administered Proellex NCT00881608 | Repros Therapeutics Inc. | Phase 1 |
| Withdrawn | Bone Mass Accrual in Adolescent Athletes NCT00827151 | Massachusetts General Hospital | Phase 3 |
| Completed | Metformin for Treatment Antipsychotic Induced Amenorrhea in Female Schizophrenic Patients NCT01206153 | Central South University | Phase 4 |
| Terminated | Treatment of Menorrhagia in Women With Thrombocytopenia Using Platelets or Platelets and Hormones NCT00556400 | Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD) | Phase 1 / Phase 2 |
| Completed | Hydrotherapy Against Menopausal Symptoms in Breast Cancer Survivors NCT00243607 | Heidelberg University | N/A |
| Completed | A Trial to Evaluate DR-2021 in Women With Secondary Amenorrhea NCT00196391 | Duramed Research | Phase 2 |
| Completed | GnRH Analogue for Ovarian Function Preservation in Hematopoietic Stem Cell Transplantation Patients NCT00429494 | M.D. Anderson Cancer Center | Phase 2 |
| Completed | Effects of Gynecological Age on LH Sensitivity to Energy Availability NCT00260286 | Ohio University | N/A |
| Completed | Bioenergetics of Exercise-Induced Menstrual Disturbances NCT04938622 | Penn State University | N/A |
| Completed | A Study to Evaluate the Safety and Effectiveness of Asoprisnil and Estrogen Administration to Postmenopausal W NCT00152282 | Abbott | Phase 2 |
| Unknown | Baselines in Reproductive Disorders NCT00456274 | Massachusetts General Hospital | N/A |
| Active Not Recruiting | Menstrual Cycle Maintenance and Quality of Life: A Prospective Study NCT00589654 | Memorial Sloan Kettering Cancer Center | — |
| Completed | Ovarian Follicle Function in Patients With Primary Ovarian Failure NCT00001275 | Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD) | — |
| Unknown | Pulsatile GnRH in Anovulatory Infertility NCT00383656 | Massachusetts General Hospital | Phase 2 |
| Completed | Reproductive Effects of Pesticide, PCB and Mercury Exposure in Laotian Immigrants NCT00011388 | National Institute of Environmental Health Sciences (NIEHS) | — |