This story kind of freaked me out a bit. Makes me feel kind of glad I’m not using donor gametes. You see those stories in movies, rarely in real life, where twins find each other much later on and realize they had a sibling they never knew about.

Excerpt from MSNBC:

Parents who conceived with donated sperm or eggs are increasingly seeking other families who used the same genetic material, sometimes locating as many as 55 “siblings” for their offspring, a study found on Tuesday.

The findings published in the journal Human Reproduction raise the issue of reusing a single donor’s sample numerous times — something policy makers may soon need to address, the researchers said.

In some cases, parents found more than 10 donor siblings, and one parent found 55 brothers and sisters for their child, Tabitha Freeman of the Center for Family Research at the University of Cambridge in Britain, who led the study, said.