Humans have a knack for sharing intimate moments in unlikely places, as membership of the mile-high club demonstrates. So there is a significant chance that the launch of the space tourism sector may be swiftly followed by the first sex in space.
First confirmed sex. It's likely to already have happened a few times. The Soviet Union even sent a husband/wife couple at one point, unless I'm misremembering.
There was that one astronaut couple (Mark Lee and Jan Davis) that got married during training and didn’t tell NASA until it was too late to train a replacement.
You know they fucked in space. I won’t believe it didn’t happen.
The concerns of the effects of gravity, especially in the very early stages.
Also concerns with the higher radiation exposure, again especially in the early stages where most development is happening at the cellular level.
And what those (and more) would mean from a longterm standpoint. These are also concerns for longterm colonies on other planets (such as Mars) which have higher radiation exposure due to Mars' lower magnetic fields and lower gravity.
You’re talking about the problems of pregnancy in space. Key difference. Most people with access to modern contraception have sex hundreds if not thousands of times for every one pregnancy.
Radiation isn't that much higher, its also not unpreventable.
Gravity... The Fetus is in a waterbubble anyway... So the problem would be birth in space. Or raising a child, wich is a problem because of muscle development.