The fetus can hear the mother's voice. Vernix is gradually absorbed by the skin, but some may be seen on babies even after birth. The fetus is developing reflexes such as swallowing and sucking. The fetus can respond to certain stimuli. The placenta is fully developed.
Brain development is very rapid.
Fingernails have grown on the tips of the fingers and toes, and the fingers and toes are fully separated. The fetus goes through cycles of sleep and wakefulness. Hair is growing on the head of the fetus. Fat begins to form on the fetus. Eyelids are beginning to open and the eyebrows and eyelashes are visible.