Andrew Veitch, a 32-year-old from Melbourne’s north-west, boasted of excellent health, a sperm count five times that of the average male’s and an altruistic desire to help 10 women become mothers.

But Kathy, using a false name to protect her child’s identity, would later discover that between 2020 and 2024, Veitch far exceeded this figure by donating his sperm to 15 women he met online, creating 27 half-siblings.

This masthead has interviewed and obtained statements from 10 of the 15 women who conceived using Veitch’s sperm after meeting him on a popular Facebook page that matches sperm donors with those wanting to start or expand their families, as well as an app that connects people with donor sperm and eggs.