@article{articlebb14510b,
title   = {Prematurity prevention: the role of progesterone},
author = {Fonseca, Eduardo B. da and Bittar, Roberto Eduardo and Damião, Rievani and Zugaib, Marcelo},
year = {2009},
doi = {10.1097/GCO.0b013e3283294770},
journal   = {Current Opinion in Obstetrics and Gynecology}
}