Pre-gravid oral contraceptive use in relation to birth weight: a prospective cohort study.

ABSTRACT: Few studies have evaluated the association between pregravid oral contraceptive (OC) use and birth weight, and findings have been conflicting. We conducted a prospective cohort study of 5921 pregnancy planners in Denmark to evaluate recency, duration, and type of OC used before conception in relation to infant birth weight. Participants completed online questionnaires and reported detailed information on contraceptive history and covariates at baseline. Participants completed bimonthly follow-up questionnaires to update their pregnancy status for up to 12 months or until conception occurred. Birth weight data were ascertained from the Danish Medical Birth Registry for 4046 live births delivered by study participants between 2008 and 2010. We used multivariable linear and log-binomial regre

SUBMITTER: Hatch EE 

PROVIDER: S-EPMC4681689 | biostudies-literature | 2015 Nov

REPOSITORIES: biostudies-literature