I have a friend at work that is 18 weeks. She had the blood test for Downs (she is 37) and it came back positive. how reliable is the blood test? she is scheduled for an in depth US on monday. She seems to be in denial and not very upset. I am just gutted for her since we lost our baby girl to downs in June. Sorry if I offended anyone by asking this here but don't know where else to post it. I am phobic of posting on the pink board and couldn't even when I did get PG.