Inside Kate Middleton, Prince William's Pregnancy Plan

USMagazine, Wednesday, June 13, 2012, 9:15am (PDT)

The Duke and Duchess of Cambridge are as eager as the rest of the world to have a little prince or princess on board -- but producing a royal heir requires careful orchestration!

"There's a window in place," a royal insider confirms in the new Us Weekly, out now. Another source explains that Kate Middleton, 30, and Prince William, 29, hope to conceive their first child anytime between the last leg of their royal tour in September 2012 and summer 2013. (This summer, the couple will be the de-facto emcees for the Summer Olympics held in London, and will be taking a royal Asia-Pacific tour in September.)

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Their ideal? A New Year's announcement! Once Middleton hits the three-month mark in her pregnancy, "the pregnancy will be announced," says the insider. "It won't be hidden."

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Although the plan may sound rigid, it is the couple's choice, the insider says. "They're excited!""

The pregnancy plan also explains why William has not yet announced his long-term career plans with the Royal Air Force. "If they're expecting, it will be full-time London for them," the source says.

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For much, much more on William and Kate's private world -- their daily routines, her hair maintenance, whether Kate pays for her own clothes, William's romantic gestures -- pick up the new Us Weekly, on stands Friday!

This article originally appeared on Usmagazine.com: Inside Kate Middleton, Prince William's Pregnancy Plan