Someone on TwoX is proposing consent to impregnation. I think that could be a great thing to have, if it was gender neutral, meaning that a man wouldn't be held accountable for children he didn't consent to. And men impregnating women against their consent could also be held accountable.

https://www.reddit.com/r/TwoXChromosomes/comments/ployvc/comment/hcceec4/