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Prevention of preterm delivery with vaginal progesterone in women with preterm labour (4P): randomised double-blind placebo-controlled trial.
Martinez de Tejada B, Karolinski A, Ocampo MC, Laterra C, Hösli I, Fernández D, Surbek D, Huespe M, Drack G, Bunader A, Rouillier S, López de Degani G, Seidenstein E, Prentl E, Antón J, Krähenmann F, Nowacki D, Poncelas M, Nassif JC, Papera R, Tuma C, Espoile R, Tiberio O, Breccia G, Messina A, Peker B, Schinner E, Mol BW, Kanterewicz L, Wainer V, Boulvain M, Othenin-Girard V, Bertolino MV, Irion O; 4P trial group. Martinez de Tejada B, et al. BJOG. 2015 Jan;122(1):80-91. doi: 10.1111/1471-0528.13061. Epub 2014 Sep 11. BJOG. 2015. PMID: 25209926 Clinical Trial.