Mariah Carey and Nick Cannon were spotted leaving a Beverly Hills office building. Were M & N visiting a fertility clinic?!

Rumor has Mariah, 38, and Nick, 28, were visiting a pre-natal specialist, and they used a decoy limo in an attempt to throw off the paps!

The two have been fighting pregnancy rumors for months, but at the Sundance Film Festival in January, the lovebirds revealed to "Extra" they weren't too sure about babies. Mariah said, "We don't know!" and Nick added, "Yeah, we'll let nature take its course!"

Mariah and Nick tied the knot in April 2008.