Physiologic Obstetrics: Ovarian and Endometrial Cycle
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Questions and Answers

What is the main regulatory axis responsible for predictable, regular, and cyclical ovulatory menstrual cycles?

  • Pancreatic-Parathyroid Axis
  • Hypothalamic-Pituitary-Ovarian Axis (correct)
  • Thyroid-Adrenal Axis
  • Gonadal-Pituitary Axis
  • Which organ is considered the target of Sex Steroid Hormones in the reproductive process?

  • Endometrium (correct)
  • Anterior Pituitary Gland
  • Ovary
  • Hypothalamus
  • What is the approximate rate of depletion of follicles per month until 35 years old?

  • 500 follicles
  • 1000 follicles (correct)
  • 2000 follicles
  • 100 follicles
  • What percentage of follicles are ovulated during a woman's entire reproductive life?

    <p>More than 99%</p> Signup and view all the answers

    Gonadotropin-independent recruitment from primordial follicle until the preantral follicle is the stage of:

    <p>gonadotropin-dependent recruitment</p> Signup and view all the answers

    Which growth factors are produced by the oocyte and regulate granulosa cell proliferation and differentiation as the primary follicle grows?

    <p>Growth differentiation factor 9 (GDF9) and bone morphogenetic protein 15 (BMP-15)</p> Signup and view all the answers

    What is the average duration of the menstrual cycle?

    <p>28 days</p> Signup and view all the answers

    During which phase of the ovarian cycle does ovulation begin?

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

    What do stromal cells surround as the antral follicle develops?

    <p>Thecal cells</p> Signup and view all the answers

    Which phase involves endometrial thickening and selection of a dominant "ovulatory" follicle?

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

    What is the role of corpus luteum during the luteal or postovulatory phase of the ovarian cycle?

    <p>Produce estrogen and progesterone</p> Signup and view all the answers

    What is the mechanism of recruitment from primordial follicles to become preantral follicles?

    <p>&quot;Gonadotropin-independent&quot; recruitment</p> Signup and view all the answers

    "Local growth factors" such as GDF9 and BMP-15 are produced by:

    <p>&quot;Oocyte&quot;</p> Signup and view all the answers

    "Semisynchronous growth selection window of the ovarian cycle" refers to:

    <p>&quot;Dominant follicle&quot; selection process</p> Signup and view all the answers

    "FSH increase in the late luteal phase" stimulates:

    <p>&quot;FSH receptor increase&quot;</p> Signup and view all the answers

    What is responsible for preparing the endometrium for implantation during the luteal or postovulatory phase?

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

    The predictable, regular, and cyclical ovulatory menstrual cycles are regulated by the HYPOTHALAMIC-PITUITARY-OVARIAN AXIS.

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

    Malfunctions of the compartments of the HYPOTHALAMIC-PITUITARY-OVARIAN AXIS can lead to reproductive failure or infertility.

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

    The rate of depletion of follicles per month is approximately 1,000 until 35 years old.

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

    The endometrium is the target organ of Sex Steroid Hormones in the reproductive process.

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

    The Primordial Follicle does not need FSH to become Preantral.

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

    Growth Differentiation Factor 9 (GDF9) and Bone Morphogenetic Protein 15 (BMP-15) are controlled by the Ovary.

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

    Ovulation begins on Day 14 of the menstrual cycle.

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

    The average duration of the menstrual cycle is 28 days, with a range of -7 to +7 days.

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

    FSH increases in the late luteal phase of the previous cycle.

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

    The Dominant Follicle is selected during the Follicular (Preovulatory) Phase.

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

    Estrogen increases in proportion to the growth of a Dominant Follicle and its number of Granulosa Cells.

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

    The only follicle progressing to a certain stage has the capacity to produce Estrogen.

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

    The Ovarian Cycle likely begins 1 to 2 days before Day 1 of the Endometrial Cycle.

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

    During each Ovarian Cycle, a group of Antral Follicles 'cohort' begins a phase of semisynchronous growth selection window.

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

    "Local growth factors" such as GDF9 and BMP-15 are produced by the Oocyte.

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

    "Semisynchronous growth selection window of the ovarian cycle" refers to the stage where only one follicle will be chosen to become the DOMINANT FOLLICLE.

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

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