Half-siblings conceived with donated sperm and eggs are connecting online using DNA testing and online registries, forming extraordinarily large genetic families with dozens to hundreds of children linked to one parent, The Washington Post reports.
The modern family ties and genetic sleuthing are making it easier for donor-conceived children to learn about their backgrounds—and harder for anonymous donors to maintain anonymity. That has clearly been proven in tragic cases in which fertility doctors misled patients about their donor’s identity, even using their own sperm to sire dozens of children. But in legal, less-scandalous cases, the online connections are also highlighting the complex consequences of America’s lax regulations of the fertility industry, particularly on sperm and egg donations.
Many other countries have set legal limits on the number of children, families, or pregnancies to which one donor can contribute. Sperm donors in Taiwan can only sire one child, for instance. In Britain, they can donate to 10 families, and in China they can provide starter material for five pregnancies. But in the US, no such limits exist.
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