Anonymous Fathers

Every year, thousands of men visit sperm banks across the country to donate sperm. Some choose to donate for financial reasons, while others are hoping to help single mothers and infertile couples become parents.

Matthew, a pediatrician from Michigan, says he first donated sperm at the suggestion of a patient's parent. "I was in a long distance relationship at the time, so I sure wasn't using it," he says. For the next four or five years, he says he donated several times a month.

"My initial motives for being a donor are the same kinds of motives that somebody has when they donate blood or sign up on a marrow registry or sign their organ donor card on their driver's license," he says. "It says, 'If I'm not using it, and it's useful to somebody else you know, that's a good thing.'"