My sister tested positive with both her boys. The only major issue was she had to be induced after she 'sprung a leak'. First time was a full induction, which was full on but her DS arrived quickly and safely (vaginal delivery) and had no side effects from the ABs. Her second DS was born in the bath, drug free, at a family birth centre Sure, she had ARM as she had a leak with him too but that was it. I guess he was given the ABs after delivery, I never thought to ask TBH as she was just so thrilled with the drug free water birth!