a. There is a realignment of the spinal curvatures during pregnancy to maintain balance (see figure 5-3).

It is due to the increase in size of the uterus and pressure on the abdominal wall. The patient walks with head and shoulders thrust backward and chest protruding outward to compensate. This gives the patient a “waddling” gait.

b. There is a slight relaxation and increased mobility of the pelvic joints, which allows stretching at the time of delivery of the infant.