As part of Channel 5's In Therapy series, Gemma will speak out about her miscarriage on the show, set to air next week on 5 July.
The reality star reveals she fell pregnant back in 2012, and was forced to give birth on her landing at four and a half months pregnant.
Gemma was unaware she had been pregnant at the time, as she had been taking a contraceptive pill.
On the show, Gemma breaks down in tears while speaking to a therapist about the loss of her baby, and she recalls: "I woke up with excruciating pains. My mum was like, 'You've got a bad stomach', and I'm thinking, 'Nah, something's not right here.' I rang an ambulance. I ended up giving birth on my landing to this four and a half month old baby."
Gemma adds that following the birth, she decided to still attend the National Television Awards that same evening.
She says: "My mum started crying, but I knew I had to go and perform at the National Television Awards. I had loads of padding on because I was bleeding heavily, but to the outside world... they wouldn't know."
Gemma's episode of In Therapy will follow on from her Celebrity Big Brother co-star Danniella Westbrook. Danniella's episode airs tonight (28 June) and she opens up on her struggle with addiction.
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