A size six Border Force student was stunned when she went into labour during riot training - as she had no idea she was even pregnant.
Beth Martin, 18, from St Anne's, Blackpool, was training to become part of the UK's Border Force, and undertaking extreme physical activity such as army and police riot training up to only an hour before she entered labour.
Known as a 'cryptic pregnancy', Beth's baby Maizie, now seven-months-old, had grown behind her mother's ribs, showing no physical bump - and had even failed to show up on two pregnancy tests.
'By the time I got to the hospital I was in so much pain,' explained Beth. 'A nurse told me straight away I looked pregnant - and then I discovered I've been in labour for 69 hours.'
Staying the same size for the entire duration of her pregnancy, Beth had put tiredness down to her intensive training.
And when she finally went into labour, she put contraction pains down to a severe case of Irritable Bowel Syndrome.
'I'd taken a pregnancy tests two months before Maizie was born in October, 2018,' said the mother-of-one.
'Someone at work had said I looked pregnant and I remember thinking how rude she was.
She added: 'I was doing a course into uniformed public services and had my heart set on becoming part of Border Force.
'My education was sport-based, about 70 hours a week of intense physical activity.
'The week before I'd had Maizie, I was doing riot police force training, where I had horses chasing me - it seemed surreal.'
Yet despite Beth taking multiple pregnancy tests that had all come back negative, she couldn't help but notice she had gained a small amount of weight, and became breathless easily.
After getting stabbing pains in her abdomen after training at college, Beth rang NHS 111 for advice - and after realising she was spotting, the call handler quickly realised the teen was in labour, sending her straight to A+E.
Little Maizie Loraine Martin was born after 76 hours of labour, three hours of pushing and less than 24 hours of preparation for Beth, weighing 7lbs 5oz.
'I had seven hours to prepare for the fact I was about to become a mum,' Beth explained. 'My two older brothers - Leo, 22 and Liam 24, both thought I was playing a prank.'
She continued: 'I'd never wanted to have kids but now I can't imagine my life without her.
'My dad was so happy, and my mum came after, shaking her head - we were all in shock. Yet I've absolutely loved becoming a mum - Maizie is the best thing in my life.
'I went back to college in September to complete my course and back to work after just thee months off on maternity leave. I wanted to show people what else I can achieve - and I'm prepared for anything.'