reproductive

• A surge in LH

  Triggers ovulation, exemplifying a positive feedback mechanism in the reproductive system
• After menstruation, the decline in progesterone and estrogen


  Triggers the hypothalamus to release GnRH, restarting the reproductive cycle - this is a negative feedback mechanism
• Contrary to misconceptions, estrogen does not inhibit FSH and LH secretion mid-cycle but plays roles in the menstrual cycle's regulatory mechanisms
• Female puberty involves specific changes

  • Excluding voice deepening
  • Excluding shoulder broadening
• FSH in females


  Promotes the maturation of ovarian follicles, essential for egg development and ovulation
• GnRH (Gonadotropin-releasing hormone)


  Signals the pituitary to release follicle-stimulating hormone (FSH) and luteinizing hormone (LH), key in reproductive processes
• Hormonal sequence for reproductive cycle

  1. FSH stimulates estrogen production

  2. Leading to LH surge

  3. Subsequent progesterone increase
• LH in males


  Stimulates Leydig cells in the testes to produce testosterone, crucial for sperm production
• Male androgens


  Drive features like muscle growth and facial hair, not the accumulation of fat on hips and thighs
• Menstruation


  Marks the expulsion of the uterine lining, a monthly preparation for potential pregnancy
• Misinterpretations about menstrual cycle phases overlook the complex hormonal interactions regulating fertility
• Testosterone and estrogen


  Are pivotal for developing male and female secondary sexual characteristics, shaping physical distinctions post-puberty
• Uterus


  Nurtures the embryo by providing a secure and nutrient-rich environment for its growth