Mum finds out fertility doctor is her child’s DAD & ‘fathered 9 other kids after using his own sperm instead of donors’

'BETRAYAL OF TRUST' Mum finds out fertility doctor is her child’s DAD & ‘fathered 9 other kids after using his own sperm instead of donors’A MUM was horrified to learn her fertility doctor is the real dad of her son, a bombshell lawsuit claims. AdvertisementBut she is now suing Dr Federick Dettmann, now 91, amid fears he used his own sperm for insemination of her son, who is now 43. It comes after Mary’s son, Joseph Laedtka Heider, was shocked to find out he had nine half-siblings through an ancestry DNA result in December 2024. Joseph said: “Words cannot fully express what it feels like to learn that your entire identity is built on a lie.” AdvertisementIn 1982 after struggling some time struggling with her fertility, Dettmann recommended Mary try artificial insemination.