American zoologist Laurie Marker has been collecting and storing specimens in a cheetah sperm bank in Namibia for 35 years, ...

Jamie Spiers has 37 biological siblings. At least, that’s how many she knows about. When her mom, a lesbian single mother by choice, conceived her using a sperm donor, the bank said only five other ...

A genetic mutation that carries a 90% cancer risk has been passed on by an unwitting sperm donor to dozens of children, a Europe-wide investigation has revealed.

For 35 years, American zoologist Laurie Marker has been collecting and storing specimens in a cheetah sperm bank in Namibia, ...

The Danish European Sperm Bank has acknowledged the donor’s sperm was overused and immediately blocked him once the mutation was discovered. A sperm donor who unknowingly carried a rare, ...