A UK woman was out like a light during what could have been the most painful experience of her life.
Alice Payne, 23, woke from an hour-long nap to find she'd almost completely given birth to her son Philip.
The Derbyshire private tutor was medically induced but didn't feel a thing.
"Because the contraction monitor wasn't reading me properly, doctors didn't realise that I was as far along as I actually was," she told the Daily Mail.
"So I was given some drugs to let me nap for a couple of hours, but 30 minutes later they realised I was ready to push."
Payne said she was medically induced at 10.30pm on December 16 after her son stopped growing in the womb at 38 weeks pregnant.
While there was nothing wrong with baby Philip in the womb, doctors thought it was better for her to give birth before something might go wrong.
Following a day of nothing happening, doctors decided to inject hormones into Alice to bring on the labour. They monitored her contractions, and steadily increased the intensity of the contractions with hormone injections.
Midwives described the birth as one of "the weirdest things they've ever seen".
Doctors, carried on increasing the amount of hormone not realising she was close to giving birth. In serious pain, Alice asked for some pain relief and was given a full dose of pethadine by medics who did not believe she was close to giving birth.
But 30 minutes later, Alice popped to the bathroom, only for her baby's heart rate to slow.
Panicked, medics got her back on the bed, where Alice fell asleep, and doctors realised she was actually 10 centimetres dilated and ready to give birth.
They thought they would need to rush her in for an emergency C-section, but in her sleep she pushed.
Alice woke for the last 10-15 minutes of the birth. As soon as he was born, Alice tells how she fell asleep again.
"I remember a nurse trying to put Philip in my arms, but I was going to sleep again, only to wake up two hours later to properly meet her son," she told the Mail.
Alice and Philip were discharged from hospital two days later and he is now a healthy baby.
She says: "Though I'm pleased I missed the pain of labour, I do wish I had been more present for my first baby's birth.
"Now when he's older and asks me, I'll have to tell him I nodded off."
Stuff.co.nz