12 weeks

We've upgraded to a plum this week!

From "What to Expect When You're Expecting"
Your baby has more than doubled in size during the past three weeks, weighing in now at 1/2 ounce and measuring (crown to rump) about 2.5 inches. About the size of a large fresh plum, your baby's body is hard at work in the development department. Though most of his/her systems are fully formed, there's still plenty of maturing to do. The digestive system is beginning to practice contraction movements (so your baby will be able to eat), the bone marrow is making white blood cells (so your baby will be able to fight off those germs passed around the playgroup), and the pituitary gland at the base of the brain has started producing hormones (so your baby will one day be able to make babies of his/her own).