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A landmark case in the Australian High Court last week ruled that a man who donated his sperm to a friend who wanted to have a child is the girl's lawful father, and the mother is barred from moving to New Zealand with her.
The case could impact thousands of couples and single women in Australia whose children were conceived with known sperm donors.
It also sets up a conflict between Commonwealth and state laws in Australia when it comes to the parentage of children born via artificial conception procedures. Kathryn talks with Queensland Family and fertility lawyer Stephen Page.
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