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Understanding Fertility Issues: Causes and Contributing Factors

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Fertility challenges can arise from various issues such as low sperm count, hormonal imbalances, failed ovulation, and anatomical problems. Environmental factors, lifestyle choices (e.g., smoking), and conditions like endometriosis and PCOS can further complicate conception. Chromosomal abnormalities and inadequate endometrial lining also play significant roles. Understanding these underlying causes is crucial for addressing infertility, guiding treatment options, and improving reproductive health outcomes. A thorough evaluation is essential for anyone facing difficulties in conceiving.

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Understanding Fertility Issues: Causes and Contributing Factors

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  1. Fertility: What can go wrong • Low sperm count or quality • Failed ovulation • Failed fertilization • Failed or misplaced (ectopic pregnancy) implantation • Malformed placenta • Miscarriage

  2. Fertility: Why it goes wrong (1) • Hormonal imbalance • Variation in hormone levels or hormone receptor levels • Environmental causes • Pituitary tumor or stress excessive prolactin levels • PCOS excessive LHlevels (no LH surge) • Anatomical problem/blockage • Innate low sperm quality or count (maybe also hormonal problem) • Testicular injury or surgery • Endometriosis • Inflammation or infection • Innate anatomical issue of reproductive tract

  3. Fertility: Why it goes wrong (2) • Chromosomal abnormality • No genetic info in egg (molar pregnancy) • Other abnormalities that cause spontaneous miscarriage • Secondary to another condition/disease • Smoking or circulatory condition placental problems • Spinal cord injury fertility probably normal, but many risks associated with delivery • Lupus flare up  inflammation & drug treatment • Endometrial lining not thick enough, or lack of appropriate receptors (does not receive correct hormonal signals) • Environmental toxins miscarriage • Menopause

  4. DISCUSSION OF GNRH ARTICLE

  5. WOMEN: Feedback loop of the early and mid follicular phases

  6. GnRH agonists: receptor desensitization by continuous administration (no pulsatile release) • Initial stimulation: “flare phenomenon” • Reduced FSH & LH after days-weeks • GnRH antagonists: block GnRH receptors • React within hours • Both result in greatly reduced release of FSH & LH, but timing is different

  7. GnRH receptors • Expressed in pituitary • Expressed in many tumors (even those not hormone-related) • GnRH agonist effect on tumors • Antiproliferative • Antimetastatic • Antiangiogenic • GnRH antagonist • Reduce LH and FSH release from pituitary • Behave like agonists on GnRH receptors in tumors (see effects above)

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