Pregnancy Hormones and Physiological Changes
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Questions and Answers

What is the primary function of human chorionic gonadotropin (hCG) in pregnancy?

  • To prepare the uterine lining for a fertilized egg
  • To prevent the disintegration of the corpus luteum and maintain progesterone production (correct)
  • To stimulate uterine contractions during labor
  • To stimulate the growth of the egg within the follicle
  • What is the primary source of progesterone during pregnancy?

  • The developing embryo
  • The corpus luteum in the ovary
  • The placenta (correct)
  • The anterior pituitary gland
  • What is the primary function of estrogen in the female reproductive system?

  • To prepare the uterine lining for a fertilized egg
  • To maintain progesterone production
  • To stimulate the growth of the egg within the follicle (correct)
  • To stimulate uterine contractions during labor
  • What is the primary source of oxytocin?

    <p>The posterior pituitary gland</p> Signup and view all the answers

    What is the function of the inner cell mass of the blastocyst?

    <p>To eventually form the embryo</p> Signup and view all the answers

    What is the function of the trophoblast?

    <p>To form the attachment to the uterus</p> Signup and view all the answers

    What is the primary function of progesterone during pregnancy?

    <p>To prepare the uterine lining for a fertilized egg</p> Signup and view all the answers

    During which stage of pregnancy does the placenta take over the production of progesterone?

    <p>During the later stages of pregnancy</p> Signup and view all the answers

    Study Notes

    Hormones in Pregnancy

    • Estrogen is primarily secreted and released by the developing follicles in the ovaries.
    • Estrogen stimulates the growth of the egg within the follicle and also stimulates the production and release of LH (Luteinizing Hormone) from the anterior pituitary gland.
    • Progesterone is secreted from the corpus luteum in the ovary after ovulation or by the placenta during pregnancy.
    • Progesterone prepares the uterine lining for a fertilized egg, favouring and supporting pregnancy.
    • Human chorionic gonadotropin (HCG) is secreted from the developing embryo and later the placenta, preventing the disintegration of the corpus luteum and maintaining progesterone production.
    • Oxytocin is primarily secreted from the hypothalamus and released by the posterior pituitary gland, stimulating uterine contractions during labour.

    Embryonic & Fetal Development

    Implantation

    • The blastocyst consists of two cell masses:
      • The inner cell mass or embryoblast, which eventually forms the embryo.
      • The outer cell mass or trophoblast, which forms attachment to the uterus and gives rise to the fetal placenta.

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    Description

    This quiz covers the anatomical and physiological changes that occur during pregnancy, including the role of hormones such as estrogen and progesterone.

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