| Recruiting | Immune Cell Populations in the Endometrium NCT06826365 | Jagiellonian University | — |
| Recruiting | Obstetrics , Prenatal Outcomes in Recurrent Miscarriage NCT06356792 | Assiut University | — |
| Recruiting | Chronic Endometritis and Benefits of Antibiotics in Women With Recurrent Miscarriage NCT06163092 | Chinese University of Hong Kong | — |
| Unknown | The Analysis of Risk Factors for Recurrent Pregnancy Loss and Prediction of Pregnancy Loss Risk NCT06249230 | RenJi Hospital | — |
| Recruiting | Prednisolone Administration in Patients With Unexplained REcurrent MIscarriages NCT05725512 | Leiden University Medical Center | Phase 4 |
| Unknown | 3D Ultrasound to Assess in Recurrent Miscarriage NCT06164015 | University Hospitals of Derby and Burton NHS Foundation Trust | — |
| Unknown | Nutritional Deficiency and Recurrent Miscarriage NCT05267678 | Westlake University | — |
| Unknown | Immune Profile Analysis and Biomarker Identification in Women With Repeated Implantation Failure or Unexplaine NCT05648136 | Centre Hospitalier Universitaire, Amiens | N/A |
| Unknown | The Cohort Study of the Correlation Between Serum 25(OH)D Level and Pregnancy Outcome NCT05824897 | Aimin Zhao | — |
| Completed | Distinct Alterations in Gut Microbiota Composition Among Women of Reproductive Age With Elevated Homocysteine NCT06001060 | First People's Hospital of Hangzhou | — |
| Unknown | The Role of Prothrombin Gene and Methylenetetrahydrofolate Reductase(MTHFR) Gene Polymorphisms as Risk Factors NCT03209063 | Assiut University | — |
| Completed | Investigation and Diagnosis of the Chromosome Variation in Donated/abandoned Blastocyst NCT05216068 | Chang Gung Memorial Hospital | N/A |
| Unknown | Iron Status in Female Infertility and Recurrent Miscarriage NCT05034250 | Medical University of Vienna | — |
| Completed | Low-dose Interleukin-2 in Women With Unexplained Miscarriages NCT03970954 | Assistance Publique - Hôpitaux de Paris | Phase 1 / Phase 2 |
| Unknown | Low Dose Prednisone Therapy in Women With Recurrent Pregnancy Loss NCT04558268 | Soroka University Medical Center | Phase 2 / Phase 3 |
| Unknown | A Study of Hydroxychloroquine Sulfate in the Treatment of Recurrent Spontaneous Abortion With Antiphospholipid NCT04624269 | Shanghai First Maternity and Infant Hospital | Phase 4 |
| Unknown | Effect of Reproductive Tract Microbiota on Pregnancy Outcome in IVF/ICSI NCT04293068 | Peking University Third Hospital | — |
| Recruiting | Effect of Prednisolone Treatment on Uterine Natural Killer Cells NCT03902912 | Chinese University of Hong Kong | Phase 3 |
| Unknown | Assessment of Natural Killer Cells in Unexplained Recurrent Pregnancy Loss NCT03941470 | Assiut University | — |
| Completed | Use of Platelet Indices for Prediction of Recurrent Miscarriage NCT03710226 | Rania Hassan Mostafa | — |
| Completed | Thyroid Hormone Values and Anti-thyroid Peroxidase Antibody Positivity in Recurrent Pregnancy Loss NCT05680376 | Zonguldak Bulent Ecevit University | — |
| Unknown | Hydroxychloroquine for Prevention of Recurrent Miscarriage. NCT03165136 | University Hospital, Brest | Phase 3 |
| Unknown | Intralipid Related Effect on NKcells in Patients With Unexplained Recurrent Spontaneous Abortion NCT03132779 | Ahmed Mohamed Bahaa Eldin Ahmed | Phase 1 |
| Unknown | Effect of Influenza Vaccination on Donor Egg Recipient Outcomes NCT02946177 | Center for Human Reproduction | Phase 4 |
| Completed | Low Plasma Mannose Binding Lectin (p-MBL) Level is a Risk Factor for Recurrent Pregnancy Loss (RPL) NCT04017754 | Aalborg University Hospital | — |
| Recruiting | Association Between Plasma Level of Mannose Binding Lectin and Human Reproduction NCT05169541 | Aalborg University Hospital | — |
| Completed | Sim (Scratch in Miscarriage) Study NCT02681627 | University Hospitals Coventry and Warwickshire NHS Trust | N/A |
| Completed | Expression of EPK in Recurrent Miscarriage NCT02694367 | Assiut University | — |
| Completed | Study on the Association Between SXCI and RM and the Possible Genetic Mechanism NCT02504281 | ShangHai Ji Ai Genetics & IVF Institute | — |
| Completed | Timing of Initiation of LMWH Administration in Pregnant Women With APS NCT02326051 | Mohamed Sayed Abdelhafez | Phase 4 |
| Unknown | Use of Warfarin After the First Trimester in Pregnant Women With APS NCT02303171 | Mohamed Sayed Abdelhafez | Phase 4 |
| Completed | EmbryoGen/ Blastgen for Couples With Implantation Problems or Previous Miscarriage NCT02305420 | FertilitySA | Phase 4 |
| Completed | A Study of the Efficacy and Safety of GB-0998 in Patients With Unexplained Recurrent Miscarriage NCT02184741 | Japan Blood Products Organization | Phase 3 |
| Unknown | A Multi-center, Placebo-controlled Study to Evaluate NT100 in Pregnant Women With a History of Unexplained Rec NCT02156063 | Nora Therapeutics, Inc. | Phase 2 |
| Unknown | Role of Sildenafil Citrate in Patients With Unexplained Recurrent Miscarriages NCT01419392 | Ain Shams University | Phase 4 |
| Completed | Walking and Dietary Modification for Recurrent Early Miscarriages NCT03023137 | Hospital dos Servidores do Estado do Rio de Janeiro | N/A |
| Completed | Low Molecular Weight Heparin in Recurrent Miscarriage With Negative Antiphospholipid Antibodies NCT01608347 | Omar Mamdouh Shaaban | Phase 4 |
| Completed | Genetic Abnormalities and Oxidative Stress in Sperm as Cause of Recurrent Miscarriage. NCT00447395 | Instituto Valenciano de Infertilidad, IVI VALENCIA | — |
| Completed | Investigation of Embryoscopy in Recurrent Pregnancy Loss NCT00589446 | Sheba Medical Center | N/A |
| Completed | Habitual Abortion Study: Oral Dydrogesterone Treatment During Pregnancy in Women With Recurrent Miscarriage NCT00193674 | Abbott Products | Phase 3 |