A doctor who fathered a secret love child confessed to a colleague he had "done something foolish", medical watchdogs have been told.
Dr Oladapo Idowu, known as David, began a relationship with the mother of his child, known only as Mrs A, in 2003, while she was a patient at the clinic where he worked, the General Medical Council (GMC) heard.
The relationship carried on for two years, but after she gave birth Dr Idowu told her not to name him as the baby's father, the GMC Fitness to Practise panel hearing in Manchester was told.
At the same time he began a second affair with Miss B, another patient at St David's Clinic in Newport, South Wales. It is claimed Dr Idowu then got another person to approach Miss B to try to stop her going to the authorities.
Dr Darren Chant, who worked with Dr Idowu at the clinic, gave evidence to the hearing via live video link from Cardiff City Hall.
He said: "He told me he had done something foolish, he had approached a third party who had made contact on his behalf.
"He asked me for my advice and I suggested he speak to the practice manager the following morning."
Partners at the practice held a meeting in May 2005 and decided to expel him from the clinic.
Dr Idowu is accused of dishonest and inappropriate behaviour and abusing his professional position. He denies misconduct.