Reproductive System, Part 3 - Sex & Fertilization (1x42)
Bemutató időpontja: 2015 Dec 16
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.
