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Placenta praevia and male sex at birth: results from a population‐based study
Author(s) -
Wu Wen S.,
Demissie K.,
Liu S.,
Marcoux S.,
Kramer M.S.
Publication year - 2000
Publication title -
paediatric and perinatal epidemiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.667
H-Index - 88
eISSN - 1365-3016
pISSN - 0269-5022
DOI - 10.1046/j.1365-3016.2000.00280.x
Subject(s) - medicine , obstetrics , placenta , confounding , logistic regression , sex ratio , population , demography , pregnancy , fetus , environmental health , sociology , biology , genetics
This study examined the relationship between male sex at birth and placenta praevia in 433 031 mother/infant dyads (linked by a common institutional code and hospital admission number) in the Canadian province of Quebec, during the fiscal years of 1991/92–1995/96. The male‐to‐female ratio among pregnancies with and without placenta praevia was calculated and compared. The male‐to‐female ratio at birth was higher in pregnancies complicated by a placenta praevia (1.19) than in those without it (1.04; P < 0.02). This increased ratio persisted after accounting separately for the potential confounding and/or modifying effects of maternal age, infant birthweight and gestational age by stratified and multiple logistic regression analyses. We conclude that pregnant women with male babies carry a higher risk of placenta praevia.