Dressing while pregnant is second nature to Kourtney Kardashian, who is expecting her third child later this year. But we have to say that this time around, the soon-to-be mama of three has been dressing casually yet fashionably all the time. Let's look at her best maternity looks, starting with this lace jumpsuit Kourtney Kardashian donned for a party in the Hamptons on Aug. 9, 2014.

Kourtney Kardashian looked ready for fall in her black skirt and plaid top ensemble while visiting Mr. Bones Pumpkin Patch in Beverly Hills, Calif., on Oct. 18, 2014.

Kourtney Kardashian hid her growing baby bump with an all-chambray outfit in New York on June 16, 2014.           

Kourney Kardashian shows off her growing baby bump in a striped T-shirt dress with a pop of color in that yellow bag for a lunch date in Southampton, New York, on Aug. 17, 2014. Kourtney Kardashian looked fashionable in a light pink dress for lunch at Serafina while filming "Keeping Up with the Kardashians" on June 27, 2014. Kourtney Kardashian added some edginess to her striped dress with a leather jacket and boots for lunch at Nate'n Al Delicatessen in Beverly Hills, Calif. on Oct. 14, 2014.