Teacher Resource: The Menstrual Cycle

Figure 1: The menstrual cycle

A diagram of the 28 days of the average menstrual cycle divided into 4 phases with each phase including an image of what the internal reproductive system’s internal organs look like during the phases. The first phase is from day 1 to 5 where the uterine lining is beginning to breakdown and the egg is leaving the body as menstruation occurs. The second phase is from day 6 to 10 where after menstruation the ovaries start to make more estrogen again and another lining begins to grow