It's not uncommon these days -- especially in Hollywood -- for a woman to get pregnant in her forties.
But Amanda Peet doesn't want to join the ranks of Kelly Preston, 47, and Celine Dion, 42.
The 38-year-old actress gave birth to her second child, Molly, in April and is eager to have a third -- but the clock is ticking.
"I'm really old," Peet told UsMagazine.com at Thursday's NYC launch party for DumbDumb. Her screenwriter husband David Benioff "was like, we have to wait three years. And I was like, we don't have three years! We'll be too old at that point," she said.
Peet -- also mom to daughter Frances, 3 -- has a point. The new issue of Us Weekly explores the risks of conceiving past the age of 40 (Halle Berry, Marcia Cross and many other celebs have become moms at an older age): fertility treatments, preterm labor, dangerously high blood pressure and diabetes.
"At 40, there's only a 10 percent chance of conception, and at 45, it's just 2 percent." Dr. Alan B. Copperman, director of reproductive endocrinology at NYC's Mount Sinai Medical Center, tells Us.
Halle Berry (she welcomed daughter Nahla at age 40 in 2008) has warned of later pregnancies, "don't look at celebrities who are doing it and think, Oh, it's easy. It's really not."