Association of external cephalic version before term with late preterm birth (original) (raw)

Acta obstetricia et gynecologica Scandinavica, 2017

Abstract

While evidence suggests that beginning an external cephalic version (ECV) before term (34(0/7) to 36(6/7) weeks) compared with after term may be associated with an increase in late preterm birth (34(0/7) to 36(6/7) weeks), it remains unknown what might account for this risk. The objective of the present study is to further investigate the association between ECV before term and late preterm birth. Secondary analysis of data collected from the international, multicenter Early ECV trials. We evaluated the relation between ECV exposure and late preterm birth (34(0/7) to 36(6/7) weeks), as well as whether additional risk factors for preterm birth (e.g. maternal age, height, body mass index, parity, placental location, and perinatal mortality rate) moderated this relation. Generalized linear mixed methods were used to account for center effect and adjust for covariates. Among 1765 women with breech pregnancies and without a prior preterm birth, 749 (42.4%) received at least one ECV befor...

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