Week 15: Naval Orange
Average size: 4.0 in, 2.5 oz
M now measures about 4 inches long, crown to rump, and weighs in at about 2 1/2 ounces (about the size of an apple or orange). M's busy moving amniotic fluid through the nose and upper respiratory tract, which helps the primitive air sacs in M's lungs begin to develop. M's legs are growing longer than the arms now, and M can move all joints and limbs. Although eyelids are still fused shut, M can sense light. If you shine a flashlight at my tummy, for instance, M's likely to move away from the beam. There's not much for M to taste at this point, but M is forming taste buds. Finally, if I were to have an ultrasound this week, one may be able to find out whether M is a boy or a girl! (But we aren't so you all are out of luck!)
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