Both my girls were over by at least a week.
DD1 - had no idea
DD2 - was due May 29 - I told everyone I was having a June baby. She was born June 5.
DS - had a feeling he would be early. On the 1st of March I was invited to a BBQ for the 8th. I actually said 'sorry, but I'm planning on being in hospital that day'. Not only was DS born on that day, but he was 2 days early!