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 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.

Schiffer's pose bears striking resemblance to Demi Moore's 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, 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."