Xray, I had multiples often before the .05 update. After that I had trouble even making them have single babies. I finally decided to revert back to the .04 version and have no more trouble with my peeps making babies. I've also had several sets of multiples since. The only problem I can see with the .04 version is that it messes up their names when they get promotions or go to college. Though as far as I'm concerned that is a small price to pay for the added ease in making babies.