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Twins can have different parents. How is that possible? A fertility expert explains

By Alex Polyakov, Clinical Associate Professor, Faculty of Medicine, Dentistry & Health Sciences, The University of Melbourne

A Gold Coast woman has given birth to twins who aren’t genetically related to each other, after becoming pregnant with a surrogate couple’s embryo and her own biological baby at the same time.

This has produced one of the rarest outcomes in reproductive medicine, the first in Australia and only the third…

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