Habitual Alcohol Consumption during Pregnancy and Perinatal Outcomes.

We investigated perinatal outcomes in pregnant Japanese women who habitually consumed alcohol during pregnancies managed at our hospital. Of the 4,791 Japanese women with singleton deliveries at ≥22 weeks' gestation, 44 (0.9%) were found to have habitually consumed alcohol during pregnancy. Multiple logistic regression analyses suggested that habitual alcohol consumption during pregnancy was not associated with adverse perinatal outcomes. However, 64% of the women who habitually consumed alcohol during pregnancy also habitually smoked; smoking leads to increased risks of a low birth weight and placental abruption.