TY - JOUR AU - da Fonseca, E B; Bittar, R E; Carvalho, M HB TI - Prophylactic administration of progesterone by vaginal suppository to reduce the incidence of spontaneous preterm birth in women at increased risk: a randomized placebo-controlled double-blind study JO - Am J Obstet Gynecol VL - 188 PY - 2003 DO - 10.1067/mob.2003.41 L3 - PubMed-ID: 12592250 SP - 419 EP - 424 ER -