She added, "ps. I may be smiling but I had to lie down for two hours dry retching after this, it’s the most exercise I’ve been able to do in 6 months!"
Box gave birth to Trixie, whose father is former Ironman Grant Kenny, in 2013.
Announcing her second pregnancy via Instagram last month, Fifi shared a sweet video of herself and daughter Trixie revealing the news. Box revealed in her post that she was expecting her child after undergoing IVF with an anonymous sperm donor.
“After a series of egg retrievals and freezing, last year I started the process to become pregnant via an anonymous donor,” she said. “I know the value of this miracle because I have seen first hand the heartbreak, tears and sacrifices so many women and couples suffer on their IVF journeys and my heart goes out to those who are facing that pain and struggle,” Box wrote in her emotional post.
Following the announcement, Box appeared on The Project to speak out on her "years-long battle" with IVF.
“Thank you guys, I’m getting really emotional,” Box said after the rest of the panel congratulated her. This is really exciting news for me and 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.”
The 41-year-old recounted how she had decided to try and have another child nearly three years ago but had been given a "very rude shock" when she found out her chances of conceiving.
“I made the decision that the right path for me and my little family was to go through IVF with the help of a donor,” she told the panel. "So I went to the clinic, I think most women in their late 30s would know that when you walk in to see an IVF specialist and you’re shown the graph, that gives you a very rude shock about your chances.
“From then on it was a case of fingers crossed, and I had my eggs retrieved and all of this is happening. But you don’t share it necessarily because you don’t know if you’re going to have any success.
“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.”