The nurse caring for the pregnant client must understand that the hormone essential for maintaining pregnancy is:
a. Estrogen.
b. Human chorionic gonadotropin (hCG).
c. Oxytocin.
d. Progesterone.
ANS: D
Progesterone is essential for maintaining pregnancy; it does so by relaxing smooth muscles. This reduces uterine activity and prevents miscarriage. Estrogen plays a vital role in pregnancy, but it is not the primary hormone for maintaining pregnancy. hCG levels increase at implantation but decline after 60 to 70 days. Oxytocin stimulates uterine contractions.
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