Never heard this before. My play through v.23 went very smoothly. Are you using mods or something? If not, maybe it could be the save your using being corrupt. I really wouldn't know what the problem is, but usually when things like this happen it's usually attributed to a corrupt save. I am not saying this is the problem, try to get the latest save file for v.2.3 and then play it from there (making sure all the girls / women are pregnant and your dating all of them).