I've heard that an unmarried pregnant woman will be jailed, have the baby taken away when born, and then deported with @whore@ or some such stamped on the passport. The baby is given a first name only, so that everyone knows that there was no legal father, and raised in a local orphange, adoption being illegal.
I haven't checked this, but it's probably not a good idea to go to a local hospital to find out if you are indeed expecting.
If an already single mother secures a job and the fact of a child is known at all stages, then there's no problem. I know a couple of women happily employed under that status.