Heavy Drinking Before Motherhood Is Bad For You

And not just because it leads to "whoops!" moments.  From August 30, 2013 WXXI (an NPR affiliate):

The more alcohol young women drink before motherhood, the greater their risk of future breast cancer according to a new study published in the Journal of the National Cancer Institute.
The findings are based on a review of the health histories of 91,005 mothers enrolled in the Nurses’ Health Study II from 1989 to 2009....

They show that if a woman averages one drink per day between her first period and having her first child, she increases her risk of breast cancer by 11 percent, an average of two drinks per day means an increased risk of 22 percent and so on.