Nicole Kidman has said that she would love to have another baby but admitted that she has started giving up hope of falling pregnant. The actress has four children and told Australia's Kyle and Jackie O show that she is trying for another child with Keith Urban but fears that her age may stand in the way. "I hope every month I am pregnant but I never am. I would be jumping for joy, but it wont happen... I’m 47," she said. "I’m baby crazy. I love babies…kids." Kidman adopted 21-year-old Connor and 19-year-old Isabella while with ex-husband Tom Cruise and has since had two biological daughters, six-year-old Sunday Rose and three-year-old Faith Margaret, with Urban. She revealed that before falling pregnant, she had spent "so much time thinking that wasn’t going to happen in my life and trying to understand that". "When it did happen — and for it to be a surprise — that was great. I had tried and failed and failed and failed. Not to be too detailed, but I’ve had an ectopic pregnancy, miscarriages and I’ve had fertility treatments. "I’ve done all the stuff you can possibly do to try get pregnant. Every woman who has been through all those ups and downs knows the depression that comes with it. So the way it just happened with Sunday was like, "What?" The percentages were so low. It is the miracle in my life."