Cervical Length and Androgens in Pregnant Women With Polycystic Ovary Syndrome: Has Metformin Any Effect?

Context: Women with polycystic ovary syndrome (PCOS) have increased risk of preterm delivery. Shortening of the cervix is a sign of preterm delivery. Objective: This study aimed to investigate potential effect of metformin on cervical length and whether androgen levels correlate with cervical length in PCOS pregnancies. Design and Setting: This was a sub-study of a randomized, placebo-controlled, multicenter study (The PregMet study) performed at 11 secondary or tertiary centers from 2005 to 2009. Participants: Two-hundred sixty-one pregnancies of 245 women with PCOS, age 18–42 years participated. Interventions: Participants were randomly assigned to metformin or placebo from first trimester to delivery. Outcome Measurements: We compared cervical length and androgen levels in metformin and placebo groups at gestational weeks 19 and 32. We also explored whether cervical length correlated with androgen levels. Results: We found no difference in cervical length between the metformin and the placebo groups at...