A cancer survivor who was told he would never be a biological father is preparing for his first Father's Day as a dad.
Kevin Byrne was 16 years old when he found out that, having lived with non-Hodgkin lymphoma since the age of four, he could not have children.
However, thanks to recent advances in male fertility treatment the 38 year old became a father in November.
As he prepares to celebrate his first Father's Day with son Arthur and wife Natalie, Mr Byrne said he hoped his decision to seek treatment might help others.
The dad from Soham, Cambridgeshire, said:
He's a very special little boy. I was concerned my family line would stop with me, but now Arthur is here, he can go on to have a family of his own.
Being a parent - something I never thought would happen for me - is simply incredible.
The couple were referred for in vitro fertilisation (IVF) treatment were advised to try a procedure called testicular sperm extraction before considering sperm donation.
The operation 18 months ago was successful in finding healthy sperm, and this was frozen until they were ready to start a family as a married couple.
Arthur was born by Caesarean section on November 10.
The Byrnes' consultant, Oliver Wiseman from the Bourn Hall Clinic in Cambridge, said their case illustrates how difficult men found it to confront the issue of infertility.