Kourtney Kardashian thinks cravings are a ''fun'' part of pregnancy.

The 35-year-old beauty, who is expecting her third child with boyfriend Scott Disick, admits she can't get enough of cheese and pickle sandwiches at the moment, but also allows herself some sweet treats.

The 'Keeping Up with the Kardashians' star told Natural Health magazine: ''I try to eat pretty healthy, but I think it's fun and important to listen to your cravings.''

She added: ''I develop a thing for Nilla Wafer cookies every time [I'm pregnant]. I have no idea why! I've also been into cheese and pickle sandwiches. Everyone thinks I'm gross when I order them.''

Kourtney tries to feed her other children, Mason, four, and Penelope, two, an organic diet, but allows them to relax their healthy eating habits when they're away from home.

She said: ''We definitely make exceptions, like if we're at Disneyland. But we eat organic when we can, and I try to keep healthy food and snacks at home, where I have the most rules and restrictions. I saw my mom making meals for my kids, and I said, 'This is the cheese you use? This is the butter?' But I guess that's just part of going to Grandma's house.''

Kourtney is thinking about starting prenatal yoga classes again, as they helped her relax when she was expecting Penelope.

She explained: ''I did yoga during my last pregnancy. I was anxious, and it just helped me feel calm.''