Nicole Kidman welcomed Faith Margaret, her second child with country music singer Keith Urban, into the world on December 28 via a gestational carrier -- and the actress admits she suffered agonizing times when trying to conceive.
She explained: "Anyone that's been in the place of wanting another child or wanting a child knows the disappointment, the pain and the loss that you go through trying and struggling with fertility.
"Fertility is such a big thing, and it's not something I've ever run away from talking about."
The Rabbit Hole star also has a two-year-old daughter Sunday Rose with Keith, as well as adoptive children Isabella, 18, and Connor, 15, with ex-husband Tom Cruise. She explained that she and her country singer husband were in a position where while they were "desperate" for another child, but she couldn't get pregnant.
Nicole added to Australian TV show 60 Minutes: "We were in a place of desperately wanting another child. The opportunity arose for us, and I couldn't get pregnant.
"Children are children -- you'll die for your children. And when you feel that as parent -- that's the unconditional love."