I didn't, but then I don't drink anyway so it wasn't hard for me. Actually, it was a relief not to have to defend my choice not to drink. As others have said, the isn't a 'safe' level of alcohol in pregnancy. Alcohol doesn't get 'filtered', whatever is in your blood will be in your babies blood. But ultimately it is up to you. Tell them to back off, as it is your choice and your decision, and its not like they have to live with the decision, so none of their business.