Even Scientology can't do anything about it. Katie Holmes is allegedly having difficulty getting pregnant again. Sources say that the former Dawson's Creek star and couch-jumping husband Tom Cruise are desperate for another child and are now seeking a specialist's help.

"She's really upset about it. The one thing she wants more than anything is a son for Tom. She says they've been trying since summer, but it just hasn't happened for them yet," a source reveals.

"Katie and Tom sat down and had a heart-to-heart and decided it might be worth her going to see the doctor to get checked out," the source adds.

The couple already has a daughter, Suri, who was born in April 2006. Cruise also has two adopted kids with ex Nicole Kidman.

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