Dear Baby, You are now officially considered a "fetus" by the medical world. (BTW, I hate that term — it holds an impersonal, medical connotation with me. You've been my baby since conception and I will consider you my baby, not fetus.) Your "tail" is now completely gone, and all the basic physical structures are now in place! Measuring nearly an inch long, you are now about the size of a green olive, or a grape. Your heart has completed dividing into four chambers, and the valves have started to form. Your kidney is functioning now, which means you've started urinating! As for external features, your sex organs are now visible, but will not be distinguishable for another few weeks. Your eyes are...