Menstrual cycle

• 1.Pituary glands release first which causes eggs to mature in ovary
• 2.Ovaries produce oestrogen which repaires lining of uterus and thickens it
• 3)LH is released by pituary glands and causes ovary to release eggs into oviduct(ovulation)
• 4)afterwards progesterone is produced by ovaries(maintains lining of uterus keeps it intact)
• 5)causes uterus to shed lining(period) and repeats every 28 days
• The reproductive hormones interact with each other during menstrual cycle
• Progesterone helps prepare body for pregnancy by:

  • Maintaining lining of uterus
  • Helps oestrogen stop production of LH
• Oestrogen

  • Eggs don't mature because pituary glands don't release FSH
  • evaluation caused because LH released instead
  • Cause ovaries to release more progesterone
• what happens day 1-5

  menstruation(bleeding from vagina) also known as period
• on day 1-5 where does blood come from

  breakdown of lining of uterus
• what happens day 5-14 (bleeding stops)

  uterus lining grows again and egg cell starts to mature in ovary
• What happens during 14-28

  Uterus lining is maintained
• On day 14?

  Ovulation (egg cell released ) and starts it's journey down oviduct
• • If egg cell is fertilised by sperm cell in oviduct then grows into embryo
  • Embryo implants itself in uterus lining
  • Women is pregnant
• • Egg cell may not be fertilised by sperm cell into oviduct then it dies
  • If not by day 28 uterus lining breaks down
  • Women have period menstrual cycle begins again
  • Then have period 28 days after
• Menstrual cycle is not always regular