The 45-year-old was speaking on Radio 5 Live when he broke down as he relived the time when he was told his mum had passed away.
Martin was only 12 years old, and a few days away from turning 13, when his mum died in an accident.
'What happened to me was, three days before my 12th birthday, I went to Sunday school, or Jewish Sunday school, as it was.
'Someone strange picked me up and took me home. I knew them but it wasn't what I was expecting and when I went home I was told there had been an accident.
'My Mum and my sister had been horse riding and there had been an accident involving a lorry, and nobody told me how serious it was', he recalled.
Martin then confessed that he didn't realise how serious the accident had been, and that his worry was that his mum wouldn't be able to come to his birthday party.
'I always remember worrying because my mum was in hospital and I was worrying that she wouldn't be there for my birthday in three days time.
'And my grandmother, my Dad's mother, said to me, "It's alright, she'll be here for your Bar Mitzvah," I'm a Jewish boy, that happens when you're 13, and I thought nothing of it.
The TV presenter went on to say that his mother's death marked the end of his childhood.
'The next day my dad told me that she had died that morning and that was the end of my childhood, that moment. I cried every day until I was 15 and then I stopped crying and became brittle.'
Ahead of Mother's Day on Sunday, Martin - who's been married to Lara Lewington since 2009 - also said he was only able to celebrate the day again after his daughter was born.
'Even when I married my wife, when it was Mother's Day, she would go with her mother for Mother's Day and I could not go with,' he admitted. 'I couldn't do it. I couldn't cope with Mother's Day.
Martin married TV presenter Lara Lewington in 2009
'Only now, thank God, with the great joy of having my daughter, only now is my wife has become Mummy, has Mother's Day become something that I can actually cope with going through', he said of the birth of his daughter in November 2012.
The journalist, who frequently appears as an expert on Good Morning Britain and This Morning, also said that he attributes some of his success to his mother's death.
He said: 'You can push harder, you can work longer, you can be stronger, you can take people not liking you, although I am not as good as that as I used to be.
'When I was in my 20s I was incredibly bullish. I think that came from "nothing is every going to be able to touch me or hurt me like it already has done".
'And I hate the fact that some of my success is due to that. And I would change it for the world, of course I would.'
In a bid to help people going through the same situation, Martin is a patron of the charity Grief Encounter and offered advice on how to help people through grief.
'If you know a child, or an adult, grief is a natural process, don't shy away from them, don't force them to talk if they don't want to but address and acknowledge what's happen.
'But you do have to acknowledge and be there and be there to talk to and have a conversation.
'It is far better to remember the wonderful person that you lost, than to remember you lost a wonderful person.'