Apparently, social media is the best way to let your friends (and fans) know you're expecting!
And yes, that would mean she was playing tennis...and winning... while pregnant! Twitter was impressed--
You don't understand - sports are hard. Tennis is hard. Playing at the level #SerenaWilliams played WHILE pregnant is out of this world.— Lissete Lanuza Sáenz (@lizziethat) April 19, 2017
And someone with a sense of humor....