With bones and cartilage starting to form and vital organs beginning to function, baby is making major progress. Body length will almost double in the next three weeks, and arm joints are now working. (Soon, legs will start working too.)
They are nearly an inch and a half long and the size of a prune, but not nearly as shriveled (even with all the time it spends in water). In fact, the babies are really taking a human shape now. Bones and cartilage are forming, and small indentations on the legs are developing into knees and ankles. The arms (complete with elbows) can flex already. Though the baby's arms are taking shape and getting stronger, each one is only about the size of this number 1. The tooth bud fairy is making her appearance this week, heralding the arrival of the twins first little choppers, which are forming under the gums. Other systems are go, too. Their stomach is producing digestive juices, the kidneys are producing larger quantities of urine, and, if they are boys, or if one of them are a boy, he's already producing testosterone.
Ultrasound pictures will be posted tomorrow!
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