MediaTakeOut.com broke the news about a MONTH ago, that Chyna was pregnant with Robs baby. Now they made the announcement official:
Rob Kardashian and Blac Chyna are about to expand ... we've learned she's pregnant! Sources close to both Chyna and Rob tell us Chyna's several months along and plans to make a big announcement on Mother's Day. This is not one of those, "Oh crap, you're pregnant." We're told they're both super excited. The baby will be Rob's first and BC's second ... she's got 3-year-old King, whose dad, of course, is Tyga.
The above is from TMZ - courtesy of Kris Jenner.