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- [2] Preterm Births - United States, 2006 and 2010 MMWR-MORBIDITY AND MORTALITY WEEKLY REPORT, 2013, 62 (03): : 136 - 138
- [5] BirthStats: Percentage of Preterm Births, United States and Selected European Countries, 2004 BIRTH-ISSUES IN PERINATAL CARE, 2010, 37 (02): : 168 - 168
- [8] Vaginal Progesterone - Cost and Health Care Utilization for Preventing Preterm Births in the United States OBSTETRICS AND GYNECOLOGY, 2017, 129 : 116S - 116S