Good Question: Biologically, How Is A Man A Man?

[WCCO 4 News, August 24, 2009] An 18-year-old South African blew away the competition at a track-and-field competition earlier this month. But her speed and build quickly raised questions about whether Caster Semenya is really a she. Why is it so difficult to tell if someone is a man or a woman? "When you really want to know, it can be quite complex," said Shari Baldinger, a Certified Genetic Counselor at Abbott Northwestern Hospital in Minneapolis.