• The menstrual cycle
     Help
  • How many days does the menstrual cycle last?
    It lasts 28 days.
  • What are the names of the hormones that the ovaries release?
    The hormones are oestrogen and progesterone.
  • How do the walls of the uterus become thicker?
    The walls of the uterus become thicker with extra blood and tissue.
  • Unlock this slideshow and over 4 million more with Baamboozle+
    Try slideshows
    • Your experience on this site will be improved by allowing cookies.