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Description
Flashcards by Emily Y :), updated more than 1 year ago
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Created by Emily Y :)
almost 8 years ago
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| Question | Answer |
| Hormones in the menstrual cycle | FSH Oestrogen LH + progesterone secreted by pituitary gland + ovaries |
| FSH | Secreted by pituitary gland, Stimulates ovaries to: A) Secrete Oestrogen B) Mature an egg |
| Oestrogen | Secreted by Ovaries Maintains Uterine lining Inhibits FSH Stimulates secretion of LH |
| LH | (Luteinising hormone) Inhibits Oestrogen secretion Stimulates release of egg Oestrogen low enough for FSH to no longer be inhibited + stop stimulating LH secretion |
| The Menstrual Cycle Summary | > FSH leads to mature egg + oestrogen secretion > Oestrogen inhibits FSH, maintains lining and leads to LH secretion > LH leads to release of egg/inhibits Oestrogen >FSH no longer inhibited by low level and cycle restarts |
| Fertility treatments | > Women given FSH and LH to stimulate release of several eggs > Eggs collected from mother + fertillised by IVF >When they are tiny balls of cells, 1 or 2 implanted into the mother.. |
| Contraceptives | > Contain hormones to inhibit FSH production so no eggs mature. > Oestrogen or Progesterone |
| Problems with hormones in contraceptives | Used to contain high levels of oestrogen, leading to significant side effects Now a much lower dose Progesterone pills have fewer side effects |
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