Each time a male pregnancy ends in childbirth, the pregnancy does not end, and when left alone, he gives birth to as many children until the pregnancy is terminated. Is there a fix for that?
(I'm sorry if wrong mod)

Hi there. The infinite birth loop is a game bug and the mere presence of Woohooer is supposed to put a stop to that. If the issue is that consistently reproducible, that is just about every pregnancy or every male pregnancy ends that way, can you try a test run with some very pregnant sims on a game where only NRaas mods are present? Possibly something else you have in play in interfering with things, if you indeed have mods in play from other sources.

Also worth checking on, is your game on a current patch level (1.67/69) and do you have the current version of the Woohooer base mod in play (v129)?