The model and actress revealed how the rugby player helped her to be "grown up" about both of the momentous events and "was always there" when needed.
"We were very grown up about it," she told the Sunday Times Style magazine. "At the time, we just approached the pregnancy in the best way we could. As two people who didn't know each other very well at all.
"Thom has only known me pregnant - all hormonal and blotchy - but he was always there for me. So even though it was a drama, I felt blessed when I got my head round it."
Brook added that she was still working to move on from the "total sadness" of her miscarriage and hinted that the couple may try for children again in the near future.
"There are moments of total sadness and devastation, and moments of relief too. But you also have to remember that it's life. Stuff like that happens.
"Some time in the next couple of years I'd love to have children. Until then, I need to concentrate on the serious business of looking glamorous."
> Kelly Brook on baby tragedy: 'I feel empty and sad'