The pregnant star and her boyfriend Scott Disick have revealed they are expecting a baby girl this spring and can`t wait for their two-year-old son Mason to meet his little sister.
Kourtney told E!: "We feel so blessed to be having a little girl and to be able to share this new experience with Mason."
However, the 32-year-old beauty`s happy news has been slightly dampened by a cold which has infected the entire Kardashian clan.
Kourtney has blamed Scott for "passing around" the illness, with few members of the close-knit unit managing to avoid it.
She wrote on twitter page: "Who is passing around sick germs in the fam like it ain`t no thang? @KhloeKardashian & I are sick & now @KylieJenner. @ScottDisick is the ONE!(sic)"
She added she was glad to have a film to watch while she rested and battled the symptoms.
She tweeted: "OMG I`m on day 3. It`s horrible. At least Boogie Nights is on. (sic)"
Half-sister Kylie Jenner also tweeted: "Don`t feel good. One gets sick. We all get sick (sic)"