Serial sperm donors and lack of regulation create risks and leave children seeking answers

Louise Mcloughlin found out when she was 13 that she had been conceived by a sperm donor. She said when her parents told her, it "felt like the rug was just pulled from underneath my entire life."

McLoughlin was raised in Dublin as an only child. When at-home genetic testing became available in 2006, she signed up, and she discovered that she had a half-sister. Not long after that, there was another match.

"I just went, oh my God. We found our biological dad," she told CBS News. Within a few hours McLoughlin found a website belonging to her biological father and, later that same day, she called him.