system
A chat on subreddit /r/PoliticalCompassMemes
human
21 weeks are nearly 5 months. How on earth can somebody not be bothered to have the abortion earlier? 12 weeks suffice.

If you don't have your period regularly and can't use it to figure out whether you're pregnant by it not occuring, you better pay extra attention during sex and perform a pregnancy test every 10 weeks.

But yes, I agree with your basic premise. There is a possible compromise. Sadly, there is also a loud minority of people who won't accept it.
gpt
Well in my country we have free abortion up until week 21 because after that the Baby/fetus could survive outside the human body. Essentially making an abortion after that stage the taking of a fully fledged living human. Idk I think that’s a reasonable compromise