Aminah Hart, 42, decided to use a sperm donor after tragically losing two sons due to a genetic disorder called x-linked myotubular myopathy, a condition that affects muscles used for movement and occurs almost exclusively in boys.

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She told ABC News that she assumed she'd raise the baby as a single mother, explaining: "It takes the romance out of it a bit, doesn't it, when you decide to take on donor sperm to try and have a baby.

"It wasn't going to be a picture postcard, being single, but I was raised by an amazing single mother and she taught me that I could do it."

After giving birth to a beautiful baby girl, Aminah was compelled to seek out the man who described himself as "happy and healthy" on the donor form.

Scott Andersen, a father of four, AFL coach, and cattle breeder, donated sperm because he thought it was the right thing to do.

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He explained: "People give blood and all that. Why wouldn't you help someone?"

He agreed to leave his contact info available at the time of his donation, but didn't expect he'd hear from anyone for years. He was surprised to get an email with pictures of Hart and her daughter Leila, but agreed to meet them.

The two quickly agreed that Scott should be a part of Leila's life, but the growing relationship -caused conflict between him and his partner, eventually leading to their break-up.

Not long afterwards, Aminah and Scott began a romantic relationship.

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The two have been together a year now, and are both involved in Leila's life, as well as the lives of Scott's other four children.

As Aminah put it: "Having the donor child as the final sibling in the family is a very modern twist, isn't it?"