Sasha Szafranski was searching for information about her Polish heritage but discovered she is not related to her mother nor her father after feeling like she did not belong in her family

A woman, who said she never felt like she belonged in her family, has discovered the scarcely believable truth 30 years on.

The mother of Sasha Szafranski's has always insisted she was not adopted and 30 years after her birth, Sasha discovered the truth about her family after using genealogy tracker Ancestry.com.

Sasha, of Coffs Harbour, Australia, was searching for information about her father's Polish heritage. She made the shocking discovery that she is not related to her mother nor her father and the wrong embryo was implanted into her mother during her last round of IVF.

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She initially thought it was an error by the website, but discovered she had a sister she had never heard of and an aunt who lived in the in her town, Australian news site news.com.au reported.

Sasha got in contact with her aunt online and asked if she and her twin sister were conceived via IVF.

“Then the penny dropped,” she told the Australia's ABC 7.30 program.

Sasha and her sister were born in 1995 after their mother Penelope’s last round of IVF at Royal North Shore Hospital in Sydney. The wrong embryo was implanted to her mother and the twins should have been born to another couple.

"They just, they just sort of said, um, there was a mix up, mum, we’re not, we are not your biological children. I said, 'What? You know, what are you talking about? I know you are. I was there,'" Penelope said.

“They had known for a while and they tried, hoping against hope that what they found out wasn’t right. So they’d all the tests and they’d had DNA and they said we’re sorry but they knew that they weren’t mine.”

Sasha still sees Penelope as her mother and says the discovery does not change their relationship.

Sasha's biological parents went on to have another daughter, who is Sasha and her twin’s biological sister.

They were also undergoing IVF treatment at the same hospital at the same time and also lived in Coffs Harbour.

Sasha has met her biological family.

She described it "like walking into a house you’ve never been in, but knowing where the light switches are, like I know how to talk to these people”.

Both families are looking to take legal action to find out what happened.

North Shore A.R.T ran the hospital’s fertility clinic from August 1994 until it was taken over by another company that later became part of IVF provider Virtus Health, the ABC reported.

Virtus Health has denied responsibility.

It was reported by news.com that spokesperson said: "In 1995 Virtus Health did not own or operate any entity associated with this incident."

The Mirror has reached out to Virtus Health for comment.