Re: pregnancy when having port wine stain?
My birthmark covers my entire left leg and I have 3 kids. None of them have birthmarks like mine. Two do have small areas; one on her inner leg the other on her tummy that are slightly lighter but that is it. During my first 2 pregancies it was in the back of my mind but with my third pregnancy I consulted a geneticist concerning my birthmark. I was very releived to find out that prot wine stains are NOT hereditary. I could not pass them on to my kids! She told me the birthmark was caused by a fluke during my mother's pregnancy. I have no blood relatives with similar birthmarks.
I do not recall my birthmark changing at all during my pregnancies.
Good luck and stop worrying!