Nowadays, at least in the US, conventional wisdom holds that alcohol should be forbidden to the pregnant, and sometimes the nursing as well.

It was not always so.

It used to be common for women to sip a cup of beer while breastfeeding. Also, women who were prone to "false labor" were told to take a drink when the pains started - alcohol made false labor subside, but true labor would continue.

I imagine any doctor giving that advice these days would be shot.