Estrogen plays an integral role in which of the following? (Select all that apply.)
a. Relaxing the smooth muscle of the uterus to prevent spontaneous abortion
b. Increasing blood flow to the uterus by pro-moting vasodilation
c. Changing the sensitivity of the respiratory system to carbon dioxide
d. Softening the cervix, initiating uterine activity, and maintaining labor
e. Working to prevent a maternal immunologic response to the fetus
f. Developing the breasts in preparation for lactation and secretion of prolactin by the pituitary gland
B, C, D, F
Estrogen plays an integral role by increasing blood flow to the uterus by promoting vasodilation; changing the sensitivity of the respiratory system to carbon dioxide; softening the cervix, initiating uterine activity, and maintaining labor; and developing the breasts in preparation for lactation and secretion of prolactin by the pituitary gland. Progesterone relaxes the smooth muscle of the uterus to prevent spontaneous abortion and works to prevent a
maternal immunologic response to the fetus.
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