i lost my baby at 18 weeks and it was due to a chromosome abnormaity she passed away the day before i went for my 18 week check up they couldnt find the heart beat so they sent me to the ultrsound and i know she was gone because she was not moving. if your placenta seprairts from the uters that cause's your baby to die and that dose not happen because of any chromosome problem it happens eather because a very extrem blow to you stomch or spontaneasly. you better get your self a docter that knows what he's talking about. sorry for your loss