Jan Karbaat, who died last month, is accused of secretly switching donor’s semen with his own in order to father 60 children without their mother’s knowing (Picture: source unknown)

The owner of a sperm bank has been accused of secretly switching donor’s semen with his own in order to father 60 children.

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Jan Karbaat, who died aged 89 last month, has been accused by 23 families of using his own sperm instead of the donors’ at a fertility clinic in Rotterdam.

He is also accused of tampering with the clinic’s data and donor descriptions and allowing couples more than the allocated six children per donor.

Bidjorp Medical Centre, which closed in 2009 following reports of irregularities, was one of Rotterdam’s largest sperm banks in the 80s and 90s.


The 23 families are now seeking a DNA test to see if the sperm bank boss used his own sperm. (Picture: Getty Images)

Karbaat reportedly admitted to fathering 60 children through the clinic before he died to one of the plaintiffs.



According to Dutch media reports, Monique Wassenaar claims Karbaat told her about the possibility he may have fathered children at the clinic himself and that she has evidence of his claim in an email.

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The 23 families are now seeking a DNA test to see if the sperm bank boss used his own sperm.

Lawyer Lisette de Haan, speaking on behalf of Karbaat’s family, insisted that there is not ‘the slightest evidence that Mr Karbaat was the donor’ and asked the court to listen to the doctor’s request that no DNA tests would be carried out after his death.

The court is due to come to a decision on June 2.