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.

This clip is from:
Bitesize Secondary, Science 1
First broadcast:
28 February 2008

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. As part of study of reproduction, sexual dimorphism could be explored. Students could compare physical differences between males and females in different organisms and explain these in terms of sexual production, adaptation and sexual selection.