Just as Kourtney Kardashian just gave birth to her third child, Kim is getting antsy about bringing another one of her own into the world.

TMZ reported that Kim was upset recently over the news that it may become difficult for her to get pregnant again. She and Kanye West have been open about the fact that they've been trying for the past nine months with no results.

According to the website, North West was a miracle baby.

Now, sources are telling Hollywood Life that Kim is jealous of her sister's fertility since she just gave birth to her third child, a son, last week.

“Kim feels Khloe’s pain now that it is difficult for her to have children,” a source told the website. “And lately, she has been really mean towards Kourtney. For a few months, things have been tense and it all comes down to pregnancy.”

“Kourtney basically can blink and have a baby and now that Kim is having trouble, she is extremely jealous and is not hiding her emotions about it to Kourtney,” they added.

Kim has been very open about wanting to give North a brother or sister. However, the struggle to conceive has been a difficult one even though the superstar has her husband, Kanye West, by her side.

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