sometimes its tought but itll work, i promise, some villagers just like to be stubborn. keep trying, worse case senario, great parenting skills. but it can take awhile.. just curious when you do this is there any kind of message at the bottom, like "their too hungry for this" somtimes if the food is low they wont breed babies but skills will rise. what level of fertility do you have? if your at level one, maybe try getting level 2 if you have the tech points, that will help alot.