Preterm delivery: a risk factor for retained placenta.
Romero R, Hsu YC, Athanassiadis AP, Hagay Z, Avila C, Nores J, Roberts A, Mazor M, Hobbins JC.
Romero R, et al.
Am J Obstet Gynecol. 1990 Sep;163(3):823-5. doi: 10.1016/0002-9378(90)91076-o.
Am J Obstet Gynecol. 1990.
PMID: 2403163