Gwyneth Paltrow reveals in the May issue of Vogue that she battled post-partum depression after welcoming her second child, son Moses, in 2006."I didn't know I had it until after it was over," the actress, 35, says. "I just didn't know what was wrong with me."

She suspects her depression stemmed from scaling back on her usual pre-baby treatments like acupuncture.

"I felt really out of my body," Paltrow says after giving birth. "I felt really disconnected. I felt really down ... I felt pessimistic."

Paltrow also scaled her career back to focus on mommyhood. (Daughter Apple turns 4 in May; son Moses is 2.)

The actress �" who returns to the big screen in May's Iron Man �" has found her comfort level tackling both, her mother Blythe Danner recently told Usmagazine.com.

"She didn't set out to be a movie star �" she set out to be a wonderful actress," Danner said.

"But motherhood is very important to her, as it was to me, and I think she's finding balance."