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Epidemiology:
doi: 10.1097/EDE.0b013e31818b47d1
Fertility: Brief Report

Handedness and Time to Pregnancy

Zhu, Jin Lianga; Obel, Carstena,b; Basso, Olgac; Bech, Bodil Hammera; Henriksen, Tine Brinkb; Olsen, Jørna,d

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Abstract

Background: Nonright-handedness, particularly mixed-handedness, has been associated with a number of medical conditions. We examined whether handedness was associated with fecundity, measured by time to pregnancy.

Methods: We used data on parental handedness and time to pregnancy from 2 regional birth cohorts in Denmark: the Aalborg-Odense Birth Cohort (1984–1987) and the Aarhus Birth Cohort (1990–1992) (n = 5808 and 3426, respectively). We applied discrete-time survival analysis to assess fecundity in relation to handedness.

Results: In both cohorts, we saw a slightly lower fecundity in individuals who reported being mixed-handed.

Conclusions: Our data showed a modest association between mixed-handedness and subfecundity, which suggests that these traits may share a common etiology, perhaps tracing back to the prenatal period.

© 2009 Lippincott Williams & Wilkins, Inc.

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