Though the fetus is only from 1 3/4 to 3 inches long crown to rump and weighs less than half an ounce, it's busily swallowing and kicking. Each day more minute details start to appear, such as fingernails and peach-fuzzy hair. The vital organs ¡X the liver, kidneys, intestines, brain, and lungs ¡X are fully formed and functional, while the head is almost half the length of the entire body. The forehead temporarily bulges and sits high on the head, but later will metamorphose into a more human-like visage.
If you could take a peek at your baby this week, you'd be able to see the clear outline of his spine. Spinal nerves stretch out from the spinal cord.
Your uterus is now the size of a grapefruit. With the help of a Doppler, a handheld soundwave stethoscope, you can hear the fetus's rapid heartbeat ¡X one expectant mother likened it to the sound of tiny horses galloping.