my sim is pregnant and ready to give birth, but she won't have the baby?????

it is obvious that its not the mods not even using the pregnancy pill thousands of times 

i read someones replay here they talked about walking ouside and it made sense to me so i did the forbidden crossed legs sit down teqnique and i watched the icon starting to flash

its probably because there is no space for you or the baby crib try it out next time it ever happens