Progesterone in Pregnancy
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Questions and Answers

What hormone maintains the endometrial lining of the uterus and increases the uterine threshold to contractile stimuli?

  • Progesterone (correct)
  • HCG
  • Estrogen
  • Prostaglandins
  • Which hormone is produced by the trophoblast and stimulates corpus luteal production of progesterone and estrogen?

  • Prolactin
  • Estradiol
  • HCG (correct)
  • Estriol
  • What hormone assumes responsibility for the production of steroid hormones during the 2nd and 3rd trimesters of pregnancy?

  • Estriol
  • Placenta (correct)
  • Prolactin
  • Progesterone
  • What is the main hormone that increases the sensitivity of the uterus to contractile stimuli near term?

    <p>Cortisol</p> Signup and view all the answers

    Which hormone stimulates local production of prostaglandins in the uterus, increasing its contractility?

    <p>Estrogen</p> Signup and view all the answers

    What hormone is transformed from cholesterol in the placenta during pregnancy?

    <p>Estriol</p> Signup and view all the answers

    What is the primary role of oxytocin during parturition?

    <p>Facilitate uterine contractions</p> Signup and view all the answers

    What happens to hormone levels after delivery of the placenta?

    <p>They return to prepregnant levels, except for prolactin</p> Signup and view all the answers

    How does prolactin affect ovulation during lactation?

    <p>Inhibits GnRH secretion</p> Signup and view all the answers

    Why does lactation not occur during pregnancy?

    <p>Estrogen inhibits prolactin action on the breast</p> Signup and view all the answers

    What is the role of suckling in maintaining lactation?

    <p>Stimulates secretion of oxytocin and prolactin</p> Signup and view all the answers

    In a 56-year-old woman who completed menopause 3 years ago, but has low levels of FSH, what could be a likely explanation?

    <p>There is a pituitary gland issue affecting FSH production</p> Signup and view all the answers

    What is the primary source of estrogen in the non-pregnant female?

    <p>Corpus albicans ovarian follicles or corpus luteae</p> Signup and view all the answers

    When does menstruation begin in relation to the degeneration of the corpus luteum?

    <p>During the degeneration of the corpus luteum</p> Signup and view all the answers

    What triggers the end of menstruation?

    <p>Stromal cells of the ovaries</p> Signup and view all the answers

    Which cells are responsible for the synthesis and secretion of estrogen and progesterone in the ovaries?

    <p>Both granulosa and theca cells</p> Signup and view all the answers

    During which phase of the menstrual cycle do estrogen levels rise rapidly?

    <p>Follicular phase</p> Signup and view all the answers

    In a pregnant female, what structure secretes hormones essential for maintaining pregnancy?

    <p>Corpus luteum</p> Signup and view all the answers

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