Professor Robert Winston describes the journey an ovum takes following ovulation. At about day 14 of the menstrual cycle, the mature egg cell is released from the ovary. This is called ovulation. It then takes around 3 days for the egg cell to travel along the fallopian tube towards the uterus. If the egg is not fertilised, the lining of the uterus begins to break down. This is called menstruation.
Students could draw a chart, such as a circle divided into 30 days, and mark what happens biologically in the menstrual cycle on each of the days. This should be related to changes in hormones released during the cycle. The reproductive cycle and organs of female humans could be compared to those of other organisms. As an extension task, the relationship between menstruation and the menstrual cycle and species adaptation and life-cycle could be explored.