| Not Yet Recruiting | Use of Nitrous Oxide for Pain and Anxiety Management During Cervical Cerclage Removal NCT07491874 | Kaplan Medical Center | N/A |
| Recruiting | Evaluation of the Clinical Performance of the PremaSure Kit to Assess Premature Delivery Risk in Symptomatic P NCT07307365 | Rea Diagnostics SA | — |
| Recruiting | Aspirin Dose Escalation for the Prevention of Recurrent Preterm Delivery Trial NCT06980025 | The George Washington University Biostatistics Center | Phase 3 |
| Withdrawn | Serial Screening and Treatment of Bacterial Vaginosis Trial NCT05278130 | Loma Linda University | N/A |
| Terminated | Merotocin in Mothers With Inadequate Milk Production and Infants Delivered Prematurely NCT02545127 | Ferring Pharmaceuticals | Phase 2 |
| Unknown | Evaluation of a New Predictive Test of Preterm Birth in Case of Threatened Preterm Labor NCT04374916 | University Hospital, Strasbourg, France | N/A |
| Terminated | Correction of Neonatal Glutathione by N-acetylcysteine in Pregnant Women at Risk of Premature Birth (GSH MAP) NCT03596125 | Nantes University Hospital | Phase 2 / Phase 3 |
| Completed | Diagnostic Tests in the Context of Threatened Preterm Labour NCT03608995 | University Hospital, Clermont-Ferrand | N/A |
| Completed | Factors Associated With Post-Traumatic Stress Disorder in Patients With After Preterm Delivery NCT03344471 | CHU de Reims | N/A |
| Completed | Fitbit Activity Tracker to Predict Risk of Preterm Birth NCT03304782 | Columbia University | — |
| Terminated | A Randomized Trial of Pessary in Singleton Pregnancies With a Short Cervix NCT02901626 | The George Washington University Biostatistics Center | Phase 3 |
| Unknown | Spontaneous Preterm Birth Marker Test NCT03123926 | Sprim Advanced Life Sciences | — |
| Completed | Efficacy of Oral Progesterone and Vaginal Progesterone After Tocolytic Therapy in Threatened Preterm Labor NCT02989519 | Sanpasitthiprasong Hospital | Phase 3 |
| Completed | Randomized Controlled Trial of Social Network Targeting in Honduras NCT02694679 | Yale University | N/A |
| Unknown | Serum Ferritin Concentration and Fetal MCA Doppler as Predictors for Preterm Delivery NCT02420743 | Beni-Suef University | — |
| Completed | Comparing Effectiveness of Treating Depression With & Without Comorbidity to Improve Fetal Health NCT02371356 | Kaiser Permanente | — |
| Completed | Biomechanics Based Prediction of Preterm Delivery NCT02037334 | David Scheiner | — |
| Unknown | Lactoferrin or Progesterone for Prevention of Preterm Delivery NCT02372942 | University of Padova | Phase 4 |
| Unknown | Cord Milking and Activity Of The Immune System In Preterm Infants NCT02043249 | Hillel Yaffe Medical Center | N/A |
| Completed | Neonatal Outcome by Reason for Delivery NCT01818518 | Obstetrix Medical Group | — |
| Withdrawn | Utility of Tocolytic Therapy for Maintenance Tocolysis in the Management of Threatened Preterm Delivery NCT01796522 | Instituto de Investigacion Sanitaria La Fe | Phase 3 |
| Completed | 25- Hydroxyvitamin D Levels in Pregnancy and Effects on Pregnancy Related Disorders NCT04637880 | Medical University of Vienna | — |
| Completed | Prediction of Preterm Deliveries by Cervical Length Measurement With Embryo Transfer Catheter in ICSI Patients NCT02059304 | Acibadem University | N/A |
| Completed | Progesterone (17P, Makena®) for Prolongation of Pregnancy in Women With Preterm Rupture of the Membranes (PROM NCT01119963 | Obstetrix Medical Group | Phase 2 / Phase 3 |
| Completed | Impact of Pre-pregnancy Micronutrient Supplementation on Maternal and Child Outcomes NCT01665378 | Emory University | N/A |
| Completed | Two Methods of Diagnosing Preterm Labor NCT01431885 | University of California, San Francisco | N/A |
| Unknown | Preterm Delivery Risk Prediction by Measurement of Prenatal Serum Screening Markers NCT01009723 | Esoterix Genetic Laboratories, LLC | — |
| Completed | Progestagens for the Tertiary Prophylaxis of Preterm Delivery NCT01178788 | University of Modena and Reggio Emilia | Phase 3 |
| Completed | Comparison of Fetal Fibronectin (fFN) Specimen Collection Methodologies: With Speculum Versus Without Speculum NCT00883324 | Hologic, Inc. | — |
| Unknown | Study of Antenatal Model to Prevent Preterm Delivery NCT01232192 | Showa University | N/A |
| Completed | PREGNANT Short Cervix Trial NCT00615550 | Juniper Pharmaceuticals, Inc. | Phase 3 |
| Completed | Prophylactic Administration of Natural Progesterone in the Prevention of Preterm Delivery in Twin Pregnancies NCT01031017 | University of Sao Paulo | Phase 4 |
| Terminated | RCT of Progesterone to Prevent Preterm Birth in Nulliparous Women With a Short Cervix NCT00439374 | The George Washington University Biostatistics Center | Phase 3 |
| Completed | Bacterial Vaginosis in Pregnancy: Detection by Weekly Vaginal pH Testing NCT00799500 | Montse Palacio | N/A |
| Completed | Prevention of Preterm Delivery in Twin Pregnancies by 17 Alpha-hydroxyprogesterone Caproate NCT00141908 | American University of Beirut Medical Center | Phase 2 |
| Terminated | Vaginal Progesterone to Prevent Preterm Delivery in Women With Preterm Labor NCT00536003 | begoña Martinez de Tejada | Phase 3 |
| Completed | Ambient Air Pollution, Preeclampsia, and Preterm Delivery NCT00468663 | National Institute of Environmental Health Sciences (NIEHS) | — |
| Completed | Efficacy of 17 Alpha-hydroxyprogesterones Caproate for the Prevention of Preterm Delivery NCT00331695 | Assistance Publique - Hôpitaux de Paris | Phase 4 |
| Completed | Does Progesterone Prevent Very Preterm Delivery in Twin Pregnancies? NCT00329914 | Rigshospitalet, Denmark | Phase 2 |
| Completed | Betamethasone Dosing Interval - 12 or 24 Hours? NCT00453141 | The Cooper Health System | N/A |
| Completed | Randomized Trial to Evaluate the Effectiveness of Nurse Case Management NCT00295256 | Johns Hopkins University | N/A |
| Withdrawn | fFN & E3 in the Prediction of PTB in Women With Twin Pregnancies Receiving 17OHP or Placebo NCT00156000 | Obstetrix Medical Group | — |
| Completed | Measurement of Hormone Levels in Patients Receiving 17-HPC for Preterm Delivery NCT00457886 | Georgetown University | — |
| Completed | The Impact of Bryophyllum on Preterm Delivery NCT00163579 | University Hospital, Basel, Switzerland | Phase 4 |
| Completed | A Randomized Trial Comparing the Impact of One Versus Two Courses of Antenatal Steroids (ACS) on Neonatal Outc NCT00201643 | Obstetrix Medical Group | Phase 4 |
| Completed | Use of the Perinatal Database and Biologic Tissue Bank at The Perinatology Research Branch (PRB) NCT00340249 | Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD) | — |
| Completed | Impact of Fish Oil Supplementation in 3rd Trimester of Pregnancy on Maternal and Offspring Health NCT01353807 | Centre for Fetal Programming, Denmark | N/A |