13 weeks: Peaches!
Your fetus is forming teeth and vocal cords... savor this, their non-functional phase. Baby is approaching normal proportions, with a head now only one third the size of the body. Intestines are in the process of moving from the umbilical cord to baby's tummy. (Much more convenient.)
It's appropriate in this 13th week that each of the babies is the size of a peach. After all, I ate what seemed like a bazillion peaches this week. (Our friends Rachel and Matthew gave us a big box of donut peaches from their yard. They were really yummy, but i now feel like I'm part peach.)
By the way, what kind of peach is only 2.9 inches in diameter? Whoever decided this obviously doesn't get the James and the Giant Peach size round peaches available here.