What is the most common...

Q. What is the most common pregnancy craving?
A. For men to be the ones who get pregnant.

http://www.lotsofjokes.com/pregnancy_jokes.asp 

Since I became pregnant...

Q. Since I became pregnant, my breasts, rear-end, and even my feet have grown. Is there anything that gets smaller during pregnancy?
A. Yes, your bladder.

http://www.jokes-db.com/jokes/pregnancy-jokes

How will I know if my vomiting...

Q. How will I know if my vomiting is morning sickness or the flu?
A. If it`s the flu, you`ll get better.

http://www.jokes-db.com/jokes/pregnancy-jokes

When will my baby move?

Q. When will my baby move?
A. With any luck, right after he finishes high school.

http://www.jokes-db.com/jokes/pregnancy-jokes

Should I have a...

Q. Should I have a baby after 35?
A. No, 35 children is enough.