LOL That was kind of confirmed after Nick said they were having at least one boy in an interview a couple weeks ago, and then a week later on twitter Mariah denied the rumor that they were having twin boys. hmm, I wonder...

Congratulations to the both of them! This will be great for them :)
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@ALEXISR: Mariah didn't do invitro. She did do some fertility treatments though. She already explained this during the "big announcement" on Access Hollywood.