All About Baby
Your embryo is growing at lightning speed, adding 1 millimeter to its tiny self each day. If that doesn't sound like a lot, imagine that you grew by one-third overnight and you'll appreciate how hard the little tyke is working! By the end of this week the embryo's head will be bigger than its body. It has little limb buds that are starting to lengthen into shoulders, arms, hands, and even the beginnings of fingers; and little leg buds that, by the end of this week, will lengthen into thigh, leg, and foot parts. That heartbeat that started last week has become more rhythmic and regular, and the heart has divided into two (of four) chambers so far. But this week's biggest news is that the embryo is growing an umbilical cord, its lifeline to nutrients and oxygen and its constant companion for the next 34 or so weeks!