'I was given a seven per cent chance of having a baby, so it's still a bit of a shock for me, it's still sinking in but we're just really thrilled,' she revealed.
Fifi also revealed that she was shown a graph that highlighted the possibilities of her falling pregnant.
'[The graph] gives you a very rude shock about your chances,' she added.
'From then on it was a case of fingers crossed, and I had my eggs retrieved and all of this is happening,' Fifi added.
The radio presenter added: 'This is really exciting news for me and (daughter) Trixie obviously, our little family. It's just so good to be able to talk about it because it's been a really private journey.'