It looks like you're using Internet Explorer 11 or older. This website works best with modern browsers such as the latest versions of Chrome, Firefox, Safari, and Edge. If you continue with this browser, you may see unexpected results.
Health Grades 7-9
This guide contains interactives and videos that support the Health learning outcomes for Grades 7-9.
Contraceptives can prevent pregnancy in three basic ways: they either block sperm, disable sperm before they reach the uterus, or suppress ovulation. But is one better than the other? How does each one work?
This video gives a description of women's monthly menstrual cycles or periods. The video includes information about the biological and hormonal changes during the cycle.
What are the evolutionary explanations for the human menstrual cycle? This video adds a unique understanding to human menstruation, pregnancy and women's health.
