Progesterone is referred to as the hormone of pregnancy because ...

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Progesterone is referred to as the hormone of pregnancy because it:
 
  a. stimulates lactation.
  b. increases ciliary action in the fallopian tubes.
  c. thins the endometrium.
  d. prevents smooth muscle contraction of the uterus.

Question 2

Endometrial thickening during the proliferative phase is stimulated by increased levels of:
 
  a. estrogen.
  b. progesterone.
  c. FSH.
  d. inhibin.

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Answer to Question 1

ANS: D
Progesterone is sometimes called the hormone of pregnancy because it relaxes smooth muscle in the myometrium, which prevents premature contractions and helps the uterus to expand. Proges-terone does not stimulate lactation, increase ciliary action in the fallopian tubes, or thin the en-dometrium.

Answer to Question 2

ANS: A
Estrogen, not progesterone, promotes endometrial thickening. Endometrial thickening is not as-sociated with FSH or with inhibin.

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