Mom-to-be Claudia Schiffer goes nude on mag cover

The supermodel, who is expecting her third child, has shed her clothes for fashion bible Vogue. Photograph: Alessandro Garofalo/Reuters

Soon-to-be mum Claudia Schiffer [ Images ] is showing off her baby bump to the world -- she posed nude for a fashion mag.

Chanel designer Karl Lagerfeld shot Schiffer, 39, for the June cover of Vogue Germany [ Images ].

Schiffer's pose bears striking resemblance to Demi Moore's [ Images ] infamous 1991 Vanity Fair cover in which the actress posed nude at seven months pregnant.

Schiffer is expecting a baby girl with hubby, filmmaker Matthew Vaughn [ Images ], in May.

The couple are already parents to seven-year-old Caspar and five-year-old Clementine.

Schiffer admits that her roles as a wife and mum have helped her change her once workaholic lifestyle.

"I used to work every single day and travel round the world. I worked weekends, I never took one second off," the New York Daily News quoted her as telling the Daily Mail.

Schiffer added: "When I met my husband I said, "You know what, this is important. I'm not going to work weekends any more." And when I had kids, I became even more careful. Modelling work is fine because you can do one day here, two days there -- you're never long gone."

She added: "I love being pregnant."

"You can do whatever you want. You don't feel guilty, because I used to feel guilty about having a day off."

"And, you know, something really strange happened to me. Before my pregnancies, I was someone who had to watch their weight. I had a personal trainer, I was working out, I would never eat anything sweet," she continued. "Anyway, I got pregnant and when I was breastfeeding it just came off. I can eat whatever I want. If I don't eat enough, I will lose weight."