One image showed Kim, 32, wearing tight black leggings and a simple white t-shirt to cover her bump, while she lifted the t-shirt for a second image revealing her stomach in all its glory.
Kim's picture, which carried the simple caption "baby love" with a heart icon, comes as the star is thought be marking the sixth month of her first pregnancy. The Keeping up with The Kardashians star announced that she and boyfriend Kanye West are expecting the addition to their family in July.
Later in the day Kim and her sister Kourtney Kardashian headed to a friend's party for which the mum-to-be sported a sleek all-black ensemble complete with a black handbag and gold jewellery. Kourtney, who has two children of her own, wore a cream and gold dress, nude heels and accessorised with sunglasses and an orange handbag.
While Kim's brunette tresses looked as lovely as ever, she posted her wish for a new look.
"Please grow out bangs! You're officially bugging me!" Kim added to a photo of Saturday's outfit.
Kim's hair underwent a makeover a month ago when she opted for a fringe. After agonising about the decision Kim settled for "long bangs, like Kate Moss".
"There's no turning back!" Kim was heard exclaiming nervously to hair stylist Philip Wolff, "What if I start crying!"
At the time Kim seemed delighted with the result, sharing an Instagram picture with her followers with the caption: "I did it! Blunt bangs."