Jessica has 77 half-brothers and sisters through the same sperm donor. She wonders how many more there could be

Queensland woman Jessica Hamilton has 77 half-brothers and sisters. But this week she learned that number could grow even further – swelled by new births.

In 1995, the year she was born, Queensland Fertility Group told Hamilton’s mother that she could expect to have between three and five siblings to other families.

The clinic still stocks some of her donor’s sperm – material for new births that has been stored for more than 30 years.

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Years later, Hamilton did a DNA test out of curiosity, expecting to find “maybe one” long-lost brother or sister. She found 13 and broke down in tears. The number has since grown, as new people discover their secret through online DNA testing. After four ‘heartbreaking’ rounds of IVF at a private clinic, Cassie put her ho