After the birth of the child the womb becomes smaller, its walls grow thicker, and the cavity within is narrowed. This series of changes partly detaches the placenta, but the separation depends chiefly upon the uterine contractions. These contractions also force the after- birth into the vagina, whence it may ultimately be dislodged by the patient if she bears down again. Usually, however, it is preferable to save her further efforts of this kind, and, as a routine, the physician places one hand upon the abdominal wall, grasps the womb, and, during the contraction, makes firm pressure downward. The maneuver expels the after-birth, which consists of the placenta, the membranes, and the umbilical cord. Then the empty womb will form a hard, spherical mass about the size of the child's head, lying just above or to one side of the bladder. Slight bleeding also occurs during the third stage, and further loss of blood follows the removal of the after-birth. The total loss varies between a half pint and a pint, though larger amounts may be noted occasionally without appreciable effect upon the mother. Naturally, large, robust women can spare much more blood than those who are anemic. And yet pregnancy invariably prepares the mother for a loss of blood that would alarm anyone unfamiliar with obstetrical practice. Often the woman just delivered is not harmed by a hemorrhage that would endanger the life of a healthy man. This may seem paradoxical, but it is not; for the surplus blood, which formerly performed important duties in connection with the nutrition of the fetus, must now be removed to readjust the mother's circulation.