title: Progesterone to prevent preterm birth in twin gestations: what is the next step forward?
authors.affiliation: Perinatology Research Branch, NICHD/NIH/DHHS, Bethesda, MD, USA. prbchiefstaff@med.wayne.edu
authors.forename: R
authors.initials: R
authors.lastname: Romero
mesh_terms: D005260:Female; D006801:Humans; D011247:Pregnancy; D059285:Pregnancy, Twin; D047928:Premature Birth / Q000517:prevention & control*; D011374:Progesterone / Q000008:administration & dosage*; D011372:Progestins / Q000008:administration & dosage*
chemical_list: D011372:Progestins; D011374:Progesterone