I get frequent email updates from various baby websites detailing what's going on with fetal development during the current week. In the latest, I read that the babe is gaining about 6 ounces each week right now. I did the math: proportionately, that is equal to 150 lb person gaining 37-56 pounds each week! No wonder I need 9-10 hours of sleep every night!
Here's a picture of someone else's cute little munchkin at 24 weeks. Might be something like what ours looks like.