There is limited research regarding the effects of alcohol consumption by breastfeeding mothers on infant development. A study examined the frequency, correlates and outcomes of alcohol use during lactation.
Maternal demographics and substance use were assessed during pregnancy and at 8 weeks and 12 months postpartum in women from an Australian cohort study. Breastfeeding duration, infant feeding, sleeping and development were also assessed postpartum. The study examined the characteristics of women who drank during breastfeeding, and a possible association between alcohol use during breastfeeding and infant outcomes.
Alcohol use was reported by 60.7% and 69.6% of breastfeeding women at 8 weeks and 12 months postpartum, respectively. Breastfeeding women who consumed alcohol were more likely to be born in Australia or another English-speaking country, be tertiary educated and have higher household incomes. Most drank at low levels ( < / = 14 standard drinks per week, < 3 per occasion) and employed strategies (e.g. timing of alcohol use) to minimise alcohol passed onto infants via breastmilk. Alcohol consumption was unrelated to breastfeeding duration, infant feeding and sleeping behaviour at 8 weeks, and most infant developmental outcomes at 8 weeks or 12 months, after adjusting for confounders.
The only significant association showed that infants whose mothers drank at 8 weeks postpartum had more favourable results for personal-social development at 12 months compared with those whose mothers abstained. The authors therefore conclude that low level drinking during breastfeeding is not linked with shorter breastfeeding duration or adverse outcomes in infants up to 12 months of age.
Source: Alcohol consumption by breastfeeding mothers: frequency, correlates and infant outcomes. Wilson J, Tay RY, McCormack C, Allsop S, Najman J, Burns L, Olsson CA, Elliott E, Jacobs S, Mattick RP, Hutchinson D. Drug and Alcohol Review, published early online 13 March 2017.