A 7-year-old girl could one day give birth to her biological half-brother or half-sister after her mother became what is thought to be the first woman to donate eggs to her infertile daughter.

Melanie Boivin, 35, from Montreal, has placed 21 of her eggs on ice for Flavie Boivin to use when she grows up.

Flavie has Turner syndrome, a condition in which one of the two X chromosomes normally carried by women is missing. It almost always causes infertility, though women who have the condition can conceive with donated eggs.

The mother-to-daughter donation is thought to be the first of its kind. Although many infertile women have been given eggs by their sisters, cousins, nieces and even daughters, biology has always prevented mothers from helping their daughters so far. Even if an infertile woman were just 20 years younger than her mother, the donor would likely be in her 40s and have poor-quality eggs.

By freezing her eggs while she is still in her mid-30s and fertile, Ms Boivin hopes to give Flavie a good chance of having children. Were Flavie to rely on an unrelated donor, she would probably have to wait for several years as there is a shortage of donated eggs in most countries, including Canada.

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