Which of the following is the cause of lordosis in pregnancy?
a. Tilting the thorax back relieves discomfort caused by muscle strain.
b. Softening of the pelvic joints decreases the support of the spinal column.
c. Loss of muscle tone makes the woman unable to maintain good posture.
d. As the uterus enlarges, the center of gravity shifts, causing the woman to lean back.
ANS: D
As the uterus enlarges and becomes heavier, the mother's center of gravity shifts forward. Progressive curvature of the spine enables her to maintain balance.
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