GCSE Biology (AQA)

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Interactions of Menstrual Hormones

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Homeostasis and Response Hormonal Coordination in Humans

Interactions of Menstrual Hormones

3:19 Hormones and the Menstrual Cycle
Spec 4.5.3.4
Previous Evaluating Contraception Next Menstrual Cycle Graphs
  • Hormones in the menstrual cycle interact in various ways.
  • The menstrual cycle begins with menstruation (period).
  • Hormone levels increase in the following order: Follicle Stimulating Hormone (FSH), Estrogen, Luteinizing Hormone (LH), and Progesterone.
  • Mnemonic for hormone order: F-O-L-M-P or phrase "fabulous owls love parties."
  • FSH stimulates the maturation of eggs and follicles in the ovaries.
  • As follicles mature, they release Estrogen.
  • Estrogen, when high enough, stimulates the release of LH from the pituitary gland.
  • LH triggers ovulation, releasing the egg into the fallopian tube.
  • Ovulation stimulates the production of Progesterone.
  • Progesterone inhibits the production of both LH and FSH to prevent multiple eggs from maturing and being released in one cycle.
  • Estrogen inhibits the production of FSH to prevent its levels from getting too high, demonstrating negative feedback.
  • Understanding these interactions and feedback mechanisms is crucial for exams but specific examples of negative feedback are not required for recall.

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