Crowther 2013

Trial name or title	Progesterone after previous preterm birth for prevention of neonatal respiratory distress syndrome: the PROGRESS trial
Methods	Randomised, double‐blind, placebo‐controlled trial
Participants	787 women recruited Women were eligible if they had a live fetus (singleton or twins), between 18 and 23 + 6 weeks' gestation and a history of prior preterm birth at < 37 weeks' gestation in the immediately preceding pregnancy (where the onset of labour occurred spontaneously, or in association with cervical incompetence, or following preterm prelabour ruptured membranes)
Interventions	Intervention: nightly vaginal pessaries of 100 mg progesterone from 20 weeks' gestation until birth or 34 weeks' gestation Control: nightly vaginal pessaries of similar‐appearing placebo, from 20 weeks' gestation until birth or 34 weeks' gestation
Outcomes	Preterm birth Infant respiratory distress syndrome
Starting date	Not clear
Contact information	Caroline Crowther caroline.crowther@adelaide.edu.au
Notes	Waiting for trial to be published. Will be included when results are available