Unlike Europe, the U.S. has few rules and oversight around sperm donation. That means one man can biologically father dozens of kids. One blond, blue-eyed rugby player from Virginia has at least 150 offspring. It’s all led to concerns around the spread of diseases and accidental incest when siblings don’t know each other.
Jacqueline Mroz is author of "Scattered Seeds."(Photo by Steve Hockstein)