She has the option to have the baby or not after getting pregnant. Men don't. I didn't invent biology. I don't think it's going to change anytime soon though, so if men want to, or don't want to, have a baby, I suggest they take my advice. Or not. Everyone has to deal with the ramifications of...
Joe shouldn't place his sperm inside a woman's vaginal canal if he doesn't want the potential responsibility of raising a child. If Joe wants a baby, he should make sure he's having sex with someone with whom he has an adult relationship with, and with whom he has discussed their common life...
If there's anything we can learn from TV shows and movies, it's that no matter how advanced an alien species is, humans will always defeat them in the end. So, I'm not worried.