Progesterone to prevent spontaneous preterm birth.

Area of Science:

• Obstetrics and Gynecology
• Perinatal Medicine
• Reproductive Endocrinology

Background:

• Preterm birth is a major global cause of infant mortality and morbidity.
• A short cervix detected in mid-pregnancy is a significant predictor of preterm delivery.
• Progesterone deficiency is implicated in the pathophysiology of preterm parturition.

Purpose of the Study:

• To evaluate the efficacy of vaginal progesterone in preventing preterm birth.
• To assess the impact of vaginal progesterone on neonatal outcomes.
• To compare vaginal progesterone with other interventions like cervical cerclage.

Main Methods:

• Meta-analysis of individual patient data.
• Inclusion of women with sonographically identified short cervix in the midtrimester.
• Comparison of treatment outcomes between vaginal progesterone, placebo, and cervical cerclage.

Main Results:

• Vaginal progesterone reduced preterm delivery rates by 45% and neonatal morbidity.
• Treatment with vaginal progesterone is effective in women with short cervix, regardless of prior preterm birth history.
• Vaginal progesterone demonstrated comparable efficacy to cervical cerclage in women with a history of preterm birth.
• 17α-Hydroxyprogesterone caproate was ineffective in reducing spontaneous preterm birth in women with a short cervix.

Conclusions:

• Vaginal progesterone is a highly effective intervention for preventing preterm birth and associated neonatal complications in women with a short cervix.
• It offers a valuable therapeutic option, particularly for women with a history of preterm birth, providing an alternative to cervical cerclage.
• The findings underscore the importance of progesterone in maintaining pregnancy and highlight a key strategy for improving perinatal outcomes.