When you are pregnant you get a sticky cervix so no more sperm can enter and you are far more tence down there than usual....I know that it is "considered" safe to have sex during pregnancy but the last 2times me and my partner had sex while me being pregnant I bled and ble and had to be rushed to a&e...Also when you are pregnant you get little nobbly bits (like tiny spoys)around the cervix and when your boyfriends penis rubs passed them they can knock off and bleed...Please be very careful.My doctor said no sex for the 1st 3months...How difficult is that???In my experience...Very.Lol