During the last 4 weeks of pregnancy the baby gains one ounce (around 28-30grams) per day. This is the time where they lay down their fat so to speak. So working on averages this babe has the potential to gain 784grams over the next 4 weeks (28 days), making bub to possibly be 4.58kg, which about 10lb2, so not huge (trust me, once you've had a 10lber even that doesn't really seem huge anymore LOL) and allowing for them to be out a bit, he could be smaller. I would say either way he's going to be perfect and you'll do just perfectly in getting him out.