Hilaria Baldwin has had four "pretty great labours".
Alec and Hilaria Baldwin
The 34-year-old star - who has Carmen, five, Rafael, three, Leonardo, 23 months, and Romeo, three months, with her husband Alec Baldwin - feels lucky that every birth has gone smoothly and thinks that is down to how "fit" she is.
She said: "I'm fit before pregnancy, I stay as fit as I can during pregnancy, and that I think has allowed me to have pretty great labours, deliveries and recovery. This time was hard because I had pneumonia during my labor and delivery, so I was really sick. It wasn't as fast as the other times, but I made a comeback."
And Hilaria feels it is important to focus on her fitness, despite her busy schedule looking after her four kids.
She added: "I have to work out when it's convenient for my four little children and my husband and my two dogs. A lot of times, what I'll do is I'll get up, get the kids ready and then I'll go for a jog. Al gets the kids in the car and will meet me at the end of my jog. And then we go and we drop the kids off at camp.
"I'm really just so efficient with trying to find windows of time. I know that my jog is 30 minutes, and if I can make my 30-minute jog and then when nap time is I can do another 30 minutes of yoga or whatever it is, that's a really good day."
The brunette beauty feels a lot more "confident" since welcoming her kids.
She told People magazine: "I am more confident and ... I'm tired. I'm very tired, but I also know that's such a finite point in people's lives.
"I meet people who have older children, in their 20s and 30s now, and they say, 'Just enjoy it.' And that's what I'm doing. I'm taking that advice. Everybody tells me that. I'm taking that advice, and I'm enjoying it."
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