The socialite and the basketball star - who married in 2009 - are keen to add to their family by having a child together and admit they are working hard to ensure Khloe gets pregnant.
Lamar told E! News: "Practice makes perfect. I'm a great shot at basketball, so hopefully it will be soon!"
While they are keen to have a baby, Khloe and Lamar are currently busy concentrating on their careers, which includes the launch of their own reality TV show together later this year.
Khloe said: "Lamar has his first career, which is basketball. Shooting a show is 12-hour days, seven days a week, so it's two full-time jobs he has."
Last month, Khloe, 26, said she thinks becoming a parent comes down to fate and isn't worried why she hasn't got pregnant yet.
She said: "I'm not desperate to have a baby. Do I want children? Yes. But I'm very happy being just Lamar and I.
"I think a baby would add so much to us, but right now, I'm so content and so happy with the way things are. People think I would sell my hair to have a child.
"We feel like we're young and whatever is meant to happen is meant to happen. I'm healthy, I know I can have children. He can have children. It's like we're not doing anything to stop it, but I don't have like an ovulation calendar and all that."