Kanye West has been encouraging Kim Kardashian to eat for two during her pregnancy.

The reality TV star - who will give birth to the couple's first child in early July - is desperate to stay fit and healthy during the final stages of her pregnancy but finds it difficult not to indulge around the rapper.

A source told the National Enquirer: ''When Kim's in LA, she tries really hard to work out and watch what she eats. But the minute she meets up with Kanye, she starts packing on the pounds.''

Kim's sisters Khloe, 28, and Kourtney, 34, who have both recently lost weight, have come up with a diet plan to help get her figure back in shape after she gives birth.

The source said: ''The plan involves eating plenty of fresh fish, organic fruits and vegetables - and no processed foods.

''The girls have always been close, but they've become even closer since Kim started taking flack for her weight gain.

''Kourtney and Khloe want to protect her from the bashing - and they'll do everything they can to help her get back in shape as quickly as possible after her baby's birth.''