Reproductive Aging

Female Reproductive Aging - Ovary's Ovation

• Menopause Definition: Permanent cessation of menstruation for 12 consecutive months due to loss of ovarian follicular activity.
  • Average age: 51 years (range 45-55).
• Hormonal Hallmarks:
  • ↓ Estrogen (E2), ↓ Progesterone
  • ↓ Inhibin B (early indicator of ↓ granulosa cell function)
  • ↓ Anti-Müllerian Hormone (AMH) (reflects ↓ ovarian reserve, declines earliest)
  • ↑ FSH (most sensitive marker, often >30-40 IU/L)
  • ↑ LH
• Pathophysiology Flow:

• Clinical Manifestations (Estrogen Deficiency): 📌 Mnemonic: HAVOCS
  • Hot flushes, night sweats (vasomotor)
  • Atrophy of urogenital tract (vaginal dryness, dyspareunia)
  • Osteoporosis (↓ bone density)
  • Cardiovascular disease risk ↑
  • Sleep disturbances, mood changes.
• Premature Ovarian Insufficiency (POI): Menopause before age 40.

⭐ The hallmark of menopause is a persistently elevated FSH level (typically >40 mIU/mL) in the context of amenorrhea.

Menopause Manifestations - Systemic Symphony

Widespread effects due to estrogen (E2) ↓:

• Vasomotor Instability (VMS):
  • Hot flushes (sudden warmth, sweating), night sweats. Most prevalent.
• Urogenital Atrophy (Genitourinary Syndrome of Menopause - GSM):
  • Vaginal dryness, dyspareunia, pruritus.
  • Urinary: urgency, frequency, recurrent UTIs. Vaginal pH ↑.
• Skeletal System:
  • ↑ Bone resorption, ↓ Bone Mineral Density (BMD) → Osteoporosis.
  • ↑ Risk of fragility fractures (vertebral, hip, Colles').
• Cardiovascular System (CVS):
  • Adverse lipid profile: ↑ LDL, ↓ HDL, ↑ Triglycerides.
  • ↑ Risk of coronary artery disease (CAD), hypertension.
• Neuropsychiatric & Cognitive:
  • Mood lability, depression, anxiety.
  • Sleep disturbances (insomnia).
  • Cognitive changes: "brain fog", memory impairment.
• Skin & Connective Tissue:
  • ↓ Collagen: skin thinning, dryness, ↓ elasticity, wrinkles.
  • Brittle nails, dry hair.

⭐ The most common and characteristic symptom of menopause is the hot flush, experienced by up to 75% of women, often disrupting sleep and daily activities.

Male Reproductive Aging - Testo's Twilight

• Andropause/Late-Onset Hypogonadism (LOH): Gradual ↓ serum testosterone (T) & associated symptoms, typically post age 40-50.
• Key Hormonal Shifts:
  • Total T: ↓ ~1%/year after age 30.
  • Free/Bioavailable T: ↓ more significantly (due to ↑ SHBG).
  • LH/FSH: ↑ (compensatory, often blunted pituitary response).
  • DHEA/DHEA-S: Marked ↓.
• Common Manifestations:
  • Sexual: ↓ libido, erectile dysfunction (ED), ↓ morning erections.
  • Physical: ↓ muscle mass & strength (sarcopenia), ↑ visceral fat, ↓ bone density (osteoporosis risk).
  • Psycho-cognitive: Fatigue, mood swings, ↓ concentration, sleep issues.
• Sperm Parameters: ↓ quality (motility, morphology), ↓ semen volume; count may persist longer.

⭐ Andropause: gradual T ↓, unlike abrupt female menopause hormonal shifts.

High‑Yield Points - ⚡ Biggest Takeaways

• Menopause: 12 months amenorrhea; average age 51 years. Follicular depletion is key.
• Hormonal Shift: ↓ Estrogen, ↓ Progesterone; ↑ FSH (earliest/best marker), ↑ LH.
• Inhibin B & AMH: ↓ Inhibin B (↑FSH cause) & ↓ AMH (↓ovarian reserve marker).
• Perimenopause: Characterized by irregular cycles, vasomotor symptoms (hot flashes, night sweats).
• Andropause (Male): Gradual ↓ testosterone; symptoms include ↓ libido, ↓ muscle mass, fatigue.
• Consequences of Estrogen Deficiency: Osteoporosis, urogenital atrophy, increased cardiovascular risk.