Model Marisa Miller flaunted her baby bump in a nude and topless photo shoot for Allure magazine.

The Victoria's Secret model posed for a series of black-and-white images captured by fashion photographer Brian Bowen Smith for an online interview. Miller discussed her pregnancy beauty routine - including her secret to avoiding stretchmarks - posing nude while pregnant, her hair, skincare and fitness routines.

The 34-year-old is due to give birth "any minute" to her first child (a boy) with her husband, music producer Griffin Guess. She credited her sisters as well as online advice for beauty regimens that she adopted durig pregnancy.

"My sisters both had babies this year and were really religious about preventative care," Miller explained to Allure. She then added the advice she got online from fellow model Molly Sims on preventing stretch marks.

"I'd been on Molly Sims's blog a lot -- she was in her third trimester when I had just gotten pregnant -- and she posted this recipe [for preventing stretchmarks]: shea butter, cocoa butter, coconut oil, and Vitamin E," the model confessed. "I made it myself, boiling the ingredients, and I poured it into mason jars. I've loved the community of women who share their tips."

As for her skincare routine, the Sports Illustrated model swapped her chemical-based products to treat acne with all natural products.

"I made sure everything was natural and organic, and I started reading blogs by other pregnant women. Everyone was talking about AfricanBlack Soap," she said. "It's made out of plantain ash, vitamin E, and shea butter, and it worked really, really well."

Miller also went the natural route when selecting products for her hair. When she had it colored, her stylist was careful enough to use an organic hair dye. To stay in shape during her pregnancy, she conrtinues to exercise but scaled back from her love of paddle boarding. She cut down her routine over time to accommodate her growing baby bump.

"I was even paddle boarding up until 17 weeks, but then my center of gravity and balance were completely off," Miller admitted. "I looked so funny standing up on the board with all that extra weight in front. I did Pilates five times a week during my second trimester, but it's so modified now, mostly stretching and breathing."

When asked what it's like posing in the buff while pregant, Miller revealed her modeling strategy for the sexy shoot. She realized that it was "better to accentuate (her) curves."

She said a lot of soon-to-be moms try to tuck in her butts or slouch to make their baby bump appear smaller or hidden in photos, but that it is important for her to flaunt the belly proudly.