Reproductive System, part 3 - Sex & Fertilization: Crash Course A&P #42

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. A&P poster: Table of Contents Four Phases of the Human Sexual Response 1:34 Fertilization 3:01 Creating a Zygote 3:21 Methods of Birth Control 7: