Cameron Diaz is happy and healthy — and now she's sharing her favorite wellness tips with the rest of us!

In a new interview, the actress opened up about fertility, menopause and aging in honor of the upcoming release of her new science-based book, The Longevity Book. And, by the sound of some of her quotes, it seems Cameron may not be planning to have a child with her husband, Benji Madden, in the future.

"Getting to know yourself on the smallest cellular level is so empowering," Cameron, 43, said. "I want women to understand their own journey and be prepared for it."

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Cameron and Benji in January 2015.

"After [age] 35, most women's eggs start to dwindle," The Other Woman star continued. "There's no way of knowing until you test yourself. That might be something you want to do in your early thirties if your fertility is important to you."

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When addressing her own age demographic, Cameron suggested women in their 40s pay close attention to where they're at "emotionally, physically and mentally" while preparing for menopause. "The women who stress have it longer and harder," she added. "But the ones who accept it have it shorter and less severe."