You may not know it when it happens, but your tiny tenant frequently gets the hiccups, which babies master before breathing; they don't make any sound because the trachea is filled with fluid rather than air. Although you've probably gained between five and ten pounds, the fetus weighs in at only 5 1/2 ounces and measures approximately a little more than 4 1/2 inches long, crown to rump. Legs are growing longer than the arms now, fingernails are fully formed, and all the joints and limbs can move. Starting about now you may be able to find out the sex of your baby by ultrasound, since external genitals are developed enough that the technician can probably tell the difference between boy and girl.
If the idea of having a baby seems so remote, nothing makes it feel more real than feeling your baby move for the first time. Most moms-to-be discern movement (called quickening) between 16 and 20 weeks. If you've been pregnant before, you'll feel things earlier rather than later. What you may first think is a rumbling stomach may be junior doing some back flips. Make note of when you first start feeling the baby, and tell your healthcare provider at your next visit.
