Vaginal progesterone reduces the rate of preterm birth in women with a sonographic short cervix: a multicenter, randomized, double-blind, placebo-controlled trial.
Ultrasound Obstet Gynecol. 2011 Jul;38(1):18-31. doi: 10.1002/uog.9017. Epub 2011 Jun 15.
Ultrasound Obstet Gynecol. 2011.
PMID: 21472815
Free PMC article.
Clinical Trial.