"In the fifth month, the baby gains two inches in height and ten ounces in weight. By the end of the month he will be about one foot tall and will weigh one pound. Fine baby hair begins to grow on his eyebrows and on his head and a fringe of eyelashes appear. Most of the skeleton hardens. The baby’s muscles become much stronger, and as the child becomes larger his mother finally perceives his many activities. The child’s mother comes to recognize the movement and can feel the baby’s head, arms and legs. She may even perceive a rhythmic jolting movement—fifteen to thirty per minute. This is due to the child. The doctor can now hear the heartbeat with his stethoscope. The baby sleeps and wakes just as it will after birth. When he sleeps he invariably settles into his favorite position called his “lie.” Each baby has a characteristic lie. When he awakens he moves about freely in the buoyant fluid turning from side to side, and frequently head over heel.... The child hears and recognizes his mother’s voice before birth. Movements of the mother, whether locomotive, cardiac or respiratory, are communicated to the child."