It will probably take up to 5 to 10 days.
They are pregnant for 3 sim days, at the end of the first two days she gets a bigger belly, and on day three there is the baby.
they are pregnant for three sim days.
This Isn't Exact But It Is About From The Day She Gets Pregent -Day 1-Day 3/4
It's instant.. I think if you kiss on free play you get a baby.. but if you have children already you wont get one.. I'm not to sure on story play, I'm finding that out at the moment..