menstrual cycle

• ovulation

  • the release of an egg cells
  • occurs approximately every 28 days
• FSH

  • produced by the pituitary gland
  • a hormone that causes an egg to mature in the ovary
  • causes oestrogen to be produced
• oestrogen

  • produced by the ovaries
  • causes blood lining of the uterus to develop
  • stop FSH being produced
  • stimulates the release of LH
• LH

  • produced by the pituitary gland
  • a hormone that causes ovulation
• progesterone

  • produced by the ovary
  • maintains blood lining in the uterus
  • stops production of LH and FSH