07/21/2005 at 08:00 AM EDT
Despite what she describes as a delayed case of postpartum depression after the June 13, 2004, birth of her and husband David Arquette's daughter Coco, Courteney Cox says she'd like to have another child.
"I went through a really hard time – not right after the baby, but when (Coco) turned 6 months," Cox, 41, tells USA Today. "I couldn't sleep. My heart was racing. And I got really depressed. I went to the doctor and found out my hormones had been pummeled."
Taking the steroid hormone progesterone helped Cox get through her difficulties, as did support from such close friends as Jennifer Aniston, who lives nearby in Malibu, and Brooke Shields, who famously suffered and conquered her own bouts with postpartum depression.
Having now shed her vulnerable feelings of what she terms "smallness" – and dealt with such strange suicidal urges as driving off a cliff, she says – Cox reveals that she and Arquette are hoping for a sibling for their daughter, whose expanding vocabulary now includes the words "lion," "flower" and "bellybutton."
As Cox tells the newspaper: "I look at Coco and say, 'I'm blessed. Why mess with this? Should I take any chances?' But we've got to try for a boy. We've got to have a little (boy) Arquette in the family."