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

Author:

Shetelig Løvvik Tone12,Stridsklev Solhild12,Carlsen Sven M.34,Salvesen Øyvind5,Vanky Eszter12

Affiliation:

1. Department of Obstetrics and Gynecology (T.S.L., S.S., E.V.), 7006 Trondheim, Norway

2. Department of Laboratory Medicine, Children's and Women's Health (T.S.L., S.S., E.V.) Norwegian University of Science and Technology, 7491 Trondheim, Norway

3. Department of Endocrinology (S.M.C.), St. Olav's Hospital, Trondheim University Hospital, 7006 Trondheim, Norway

4. Department of Cancer Research and Molecular Medicine (S.M.D.), Norwegian University of Science and Technology, 7491 Trondheim, Norway

5. Department of Public Health and General Practice (Ø.S.), 7491 Trondheim, Norway

Abstract

Abstract 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 gestational week 19 and 32. Dehydroepiandrosterone (DHEAS) tended to be higher in the metformin group. There were no correlations between androgens and cervical length at week 19. At gestational week 32, androstenedione (P = .02) and DHEAS (P = .03) showed a trend toward negative correlation to cervical length. High androstenedione level correlated with shortening of cervical length from week 19 to 32 when adjusted for confounders (P = .003). T (P = .03), DHEAS (P = .02), and free testosterone index (P = .03) showed a similar trend. Conclusion: Metformin in pregnancy did not affect cervical length in women with PCOS. High maternal androgen levels correlated with cervical shortening from the second to the third trimester of pregnancy, as a sign of cervical ripening.

Publisher

The Endocrine Society

Subject

Biochemistry, medical,Clinical Biochemistry,Endocrinology,Biochemistry,Endocrinology, Diabetes and Metabolism

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