Kim reportedly rushed to her doctor on Tuesday night after experiencing stomach pains, according to the New York Post. Kim, who is four months pregnant, was told to rest, which she had not been doing. She had just returned from Paris fashion week that night.
"A lot of you have expressed concern in the recent hours about Kim, and I just wanted to let you all know that mommy and baby are doing fine and just taking it easy right now," Khloe wrote in a post on her website Thursday. "Thank you so much to all of our wonderful fans and loved ones for your concern and support. We love you!"
Kim and Kanye West announced the pregnancy in December. The couple was first publicly linked last spring, though Kardashian is still legally married to NBA player Kris Humphries. She filed for divorce from him in late 2011. Humphries is expecting his own child, with ex-girlfriend Myla Sinana.