3.5.26

Menstrual Hormones

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Menstrual Hormones

The menstrual cycle is controlled by four hormones from the endocrine system. These hormones are:

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FSH

  • FSH stands for Follicle Stimulating Hormone.
  • It is released by the pituitary gland and causes an egg in the ovary to mature.
  • FSH also stimulates (encourages) the production of oestrogen.
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Oestrogen

  • Oestrogen is produced in the ovaries and causes the development of the thick, spongy uterus lining.
  • Oestrogen also stimulates the production of Luteinising Hormone (LH) and inhibits (stops) the production of FSH.
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LH

  • LH stands for Luteinising Hormone.
  • LH is produced by the pituitary gland and stimulates the release of a mature egg on Day 14 of the menstrual cycle.
  • This release is called ovulation.
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Progesterone

  • Progesterone is produced in the ovaries after ovulation.
  • It is responsible for maintaining the lining of the uterus during days 14-28.
  • When progesterone levels drop, this triggers the breakdown of the lining. This marks day 1 of the next menstrual cycle. Progesterone also inhibits (stops) the release of LH and FSH.

Jump to other topics

1The Nature & Variety of Living Organisms

2Structure & Functions in Living Organisms

3Organism Functions

3.1Respiration

3.2Gas Exchange

3.3Transport

3.4Excretion

3.5Coordination & Response

4Reproduction & Inheritance

5Ecology

6Biological Resources

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