Marc Stephens watches an internet video to help deliver his wife's baby
An engineer in Cornwall delivered his baby son after watching an instructional video on YouTube.
Marc Stephens watched the videos as a precaution when his wife Jo started to feel some discomfort.
Four hours later, his wife went into labour and started giving birth before an ambulance could arrive at their home in Redruth.
"I Googled how to deliver a baby, watched a few videos and basically swotted up," Mr Stephens told the BBC.
Jo Stephens said they had planned a home birth, but not quite in this manner.
"I woke up and realised I was having contractions every five minutes," Mrs Stephens said.
"I woke Marc up and we phoned the midwife, but they were all so busy they couldn't come round to our house and told us to call an ambulance. But before it arrived, it all started."
A few hours earlier, Mr Stephens has been reading up on home births and how to cope with anything unexpected.
"The videos gave me peace of mind. I think I would have coped, but watching videos made things much easier."
Mr Stephens said his wife was on all fours when he saw the head starting to come out.
"This is our fourth child now and while for our first I spent most of the time at my wife's head, now I'm not afraid to go down to the business end.
"I was still on the phone to the midwife and told her that 'this is it'," he said.
Mr Stephens said he felt no panic, putting his ability to stay calm down to his Royal Navy training.
After delivering the 5lbs 5oz boy, Gabriel, the Stephens went to the Royal Cornwall Hospital at Treliske, where both mother and baby got a clean bill of health.