CNN This Is Life With Lisa Ling September 20, 2015 06:58:00
Inside this building, billions of sperm have been collected, all waiting for a shot at creating a baby. >> have you ever used a microscope before? >> not since seventh grade. but i'm seeing a plethora. wow, they're fast little buggers. >> how much sperm is in this specimen? >> a healthy male will have 20 million sperm per milliliter of semen produced. >> 20 million? >> 20 million. >> she's the lab director who oversees the journey of these little guys from collection cup to cryo tank and is the gate keeper for who is and isn't allowed to donate. >> is it hard to become a donor? >> it's a rigor...