Khloe Kardashian having "major problems getting pregnant" with Lamar Odom?

Khloe Kardashian is reportedly facing significant fertility issues.

The reality star, who is married to NBA star Lamar Odom, is said to have been trying to conceive a baby for some time.

"Khloe is having major problems getting pregnant," a source told Us Weekly. "It's not contrived for their reality show."

Another insider went on to say that Khloe feels the pressure to get pregnant even more so now that her sister Kim is married as well.

"If Kim were to get pregnant first, that would cause tension, because it would highlight Khloe's struggle," the second source said.

The insider continued: "There is some friction now because Khloe knows [Kim's pregnancy] is the next step and she feels terrible she can't get pregnant herself."

Kim recently appeared on Good Morning America, where she said that it would be fun for all three Kardashian sisters to be pregnant at once.

However, Kim went on to say that she plans to enjoy her marriage for a little bit first before trying to conceive a baby.

Earlier this month, Kim confessed that she feels ready to start a family, saying that she hopes to get pregnant soon.

Watch the Kardashians on GMA below: