Most people would think that finding out they're unexpectedly pregnant would be enough of a surprise.

But for Sasha Hood, 24, from Sandbach, Cheshire, were left stunned when she went into labour and her partner Marc Jepson, 29, an IT contractor, had to deliver their baby on the bathroom floor.

And Marc even saved his son's life when he was born with the umbilical cord wrapped around his neck.

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Sasha Hood, a 24-year-old administrator from Sandbach, Cheshire, didn't know she was pregnant with baby Theo, who weighed 7Ib 6oz at birth and is now two months old, until the day that she gave birth

Theo's birth came as a complete surprise as Sasha was taking the contraceptive pill and had regular periods

Sasha, an administrator, who was on the contraceptive pill, had no idea she was pregnant - throughout nine months she had no bump, felt no kicks and even continued to have periods.

Yet baby Theo, who is now two months old, was a bouncing 7lb 6oz when he made his entirely unexpected entrance in the world, forcing his father into the terrifying role of midwife when they didn't make it to the hospital in time.

Stunned Marc then announced the surprise birth to friends and family on Facebook writing: 'Well what can I say… 24 hours ago we had no idea and at 16.45 yesterday Sasha gave birth and I delivered (don't ask!) our beautiful son at home.

'This is a massive surprise to us both as we didn't even know she was pregnant until yesterday.'

Sasha said: 'Even now I look back and wonder how I didn't know I was pregnant. But I took my pill like clockwork. Until it happened to me, I never imagined any woman could have a baby and not realise she was pregnant.'

Marc Jepson, 29, an IT contractor, delivered their baby on the bathroom floor and unwrapped the cord from his son's neck as he was struggling to breathe

In fact, the first indication came one evening in March when Sasha began to get stomach cramps.

She said: 'I took some painkillers and went to bed and even managed to go to work the next day.

'But when I got home the pain was suddenly worse so I made an appointment with my GP for 10am next day.

'After an agonising night I explained my symptoms and I was really worried when the doctor looked surprised as she examined my tummy.

'However I was shocked when she said she was referring me to the maternity unit.'

Sasha was only told she was pregnant when she went to her GP with stomach cramps and was referred to the maternity ward, where she was told she was around 30 weeks pregnant

Later the same day, Sasha's cramps became worse and she felt the urge to push. The ambulance was 15 minutes away so Marc had to deliver the baby himself on the bathroom floor

She immediately rang Marc. 'We'd spoken about having a family but that was years off,' she said, 'so I had no idea how he'd take it.'

Marc said: 'I simply couldn't believe it at first. But then relieved Sasha didn't have some terrible illness, I think I said something like "this is crazy" and then I said something like "that's great news…" But then I had no idea Sasha was actually nine months gone.'

Marc met Sasha at hospital, where doctors estimated she was approximately 28 to 32 weeks pregnant.

Adds Marc: 'I asked Sasha how we possibly couldn't have known, but medical staff said that no contraception is 100 per cent foolproof and although rare, surprise babies can happen.'

The couple were sent home after the pains subsided.

But within a few hours the pains returned with a vengeance. As Sasha cried out in agony, Marc dialled 999.

The couple couldn't work out how they hadn't realised she was pregnant, but were told by medical staff that no contraception is 100 per cent foolproof

Sasha said: 'I'd had a bath to help soothe the pains but as I lay on the bathroom floor I felt the urge to push.'

Still on the phone to the paramedics, Marc rushed to find clean towels and reassured Sasha help was on its way.

But within 15 minutes baby Theo arrived - only he wasn't crying.

Sasha says: 'It was a frightening moment as Marc and I realised the cord was round the baby's neck. Luckily Marc followed all the instructions from the paramedic on the phone and managed to free Theo. Hearing him finally cry was wonderful.'

The couple were frightened when Theo didn't cry as he was born. Marc unwrapped the umbilical cord from his neck to help him breathe

Dazed Marc, who was still on the phone to the paramedic, wrapped baby Theo in a towel and handed him to Sasha.

She said: 'I was so relieved I sobbed. When I handed him back to Marc and saw him proudly hold him, I was overcome again with emotion. It was clear despite the shock, Marc was overjoyed to be a dad.'

There was a bang on the door - the paramedics and Mark's mum Shirley had arrived.

Baby Theo was checked and found to be perfectly healthy with doctors estimating he was actually four days overdue

The couple had no baby equipment but their family and friends rallied round and helped them buy a cot and baby clothes

'Marc's mum said congratulations. She was in tears of joy and she was as stunned to suddenly be a grandma as we were to be parents.'

Baby Theo was checked and found to be perfectly healthy. Doctors even estimated that he was actually four days overdue.

The couple named their new baby Theo - which means gift of God in Greek - and they are slowly adapting to sleepless nights and being parents.

'But even though we were totally unprepared, we are so happy to have Theo,' says Sasha, 'we both still look back and can't believe we didn't know we were having a baby.