Menstrual Cycle

• Menstrual cycle


  A recurring process which takes around 28 days
• Menstrual cycle


  1. Preparing the lining of the uterus for pregnancy

  2. Shedding the lining of the uterus if implantation of the fertilised egg into the uterus lining does not happen
• Menstruation


  Shedding the lining of the uterus
• Oestrogen


  When oestrogen is higher, progesterone peaks
• Progesterone


  When progesterone is high, it makes the uterus wall thicker
• What happens when a fertilised egg does not embed in the uterus wall?

  It is released along with the menstrual blood
• Oestrogen


  One of the main female sex hormones
• Oestrogen


  • Causes the thickening of the uterus lining
• Progesterone


  Continues the thickening of the uterus lining