Credit: Jason LaVeris/FilmMagic

Currently expecting her second child with Cash Warren, Jessica Alba says her body never quite recovered from her first pregnancy.

PHOTOS: Look back on Jessica's first pregnancy

"I can't ever get down to the weight I was before I had Honor," the Spy Kids 4 actress, 30, tells Allure's August issue.

"My body's just different. The jeans just sort of zip up differently, and things hang differently. It's a miracle what happens, but you definitely are different afterward. Unless you're Gisele."

Ironically, it wasn't until Honor's 2008 birth that Alba embraced her sexuality. "I was quite shy with it," she admits. "It wasn't something I embraced until I had my daughter. I saw how incredible and amazing it is to be a woman and to be able to create a life. There's a reason why certain areas of the body are desirable –- because it all leads to reproduction."

Looking back, Alba has a sense of humor about being called a sex symbol. "According to some people, I peaked in my early 20s," she says with a chuckle. "I was like, 'Oh, really? I feel like I'm getting better.'"