sex in space sucks
seriously.(or at least thats the rumor)
first.... blood pressure doesn't work the same as it does on earth, meaning it is VERY difficult to keep an erection.
second... each time you push on your partner, you are pushed away as is your partner.
third.... sweat does not evaporate since there is no gravity. up is completely lost so the evaporating sweat doesn't know where to go, so instead it sticks to you. even in temps of 70 F - 75 F astronauts complain of LARGE amounts of sweat which usually ends up getting in their eyes. (if you look at some shuttle pics, you'll notice many astronauts carry a towel to wipe it all off)
sweat is fun during sex, but too much of it makes you miserable.
then we think about having a baby in space.
well, micro gravity can GREATLY alter its development.
image how micro gravity changes the way we sweat, now imagine how it changes the way we grow.
Bones would be VERY VERY weak at birth, blood pressure would naturally be VERY low, the heart would be very weak because of that. Plus oddly enough, the babies immune system would be greatly inefficient for some reason.