Welcome to BYH!
I heard that for pigs you need to have a space for the babies to get away from the mothers so that she doesn't accidentally step on them or something. I don't have any experience with pregnant pigs yet, sorry. :}
You're welcome!
I'm not sure about pigs, but goats can, and I think often do, start to fill their udders before they have the babies. Some though, I have heard, will wait to fill their udder until they have the kids! I would guess that pigs are kind of similar?
Everything I have read has said that within 48 hours of milk showing up I should have babies lol I first noticed it Thursday and still nothing. I posted in pig forum hopefully someone will see it!