I was the same as Kathryn...it was okay and normal while I was pg (in fact, people forgot and would get shirty if I didn't want to go out or stay late!) but as soon as I had DS, the invitations to do stuff tapered right off. Some good friends were understanding and accomodating, but others didn't even bother to check if I could get a babysitter. Some even stopped ringing ("oh I didn't want to wake the baby if he was sleeping")...it is a bit sad & depressing when this happens.