Crash Course

Reproductive System, Part 3 - Sex & Fertilization (10x42)

Air date: Nov 16, 2015

After weeks of discussion of human reproduction, today we arrive at the main event: THE SEX. Hank explains the four phases of the human sexual response, how a sperm finds and fertilizes an egg, creating a zygote, and how different types of contraception work to prevent that from happening.