Breast disease risk linked to alcohol prior to pregnancy

Researchers have shown for the first time that drinking alcohol between menarche and first full-term pregnancy is associated with breast malignancy and with proliferative benign breast disease, in a dose-response manner.

This fits with the knowledge that breast tissue is particularly susceptible to carcinogens prior to pregnancy, but has not previously been demonstrated in research, the authors said. They examined the association using data from 91,000 women in the Nurses’ Health Study II.

J Natl Cancer Inst 2013; online 28 August