Alessandra Ambrosio Is Pregnant & Nude In Vivara Jewelry Campaign (DETAILS)

Pregnancy and childbirth may not be the easiest thing, but it certainly is a beautiful thing.

It's been the trend for celebrity moms-to-be to take photos of themselves during pregnancy for the world to see. We saw Jessica Simpson in all her pregnant glory on the cover of Elle and Nia Long did the same on the cover of Ebony.

PHOTOS: Alessandra Ambrosio Bares Her Beach Baby Bump, Again!

Supermodel Alessandra Ambrosio is the latest woman to pose nude during her pregnancy, but this time it's not for a magazine cover, it's for a Brazilian jewelry company named Vivara.

The company could be promoting "push gifts," which is a present that a man gives his child's mother for giving birth. 

PHOTOS: Fun, Flirty Alessandra Ambrosio & Jamie Mazur Take German Vogue

In any case, the Victoria's Secret Angel looks beautiful, although we have to admit that the pregnancy photo to sell any type of jewelry is a bit odd.

Alessandra Ambrosio posted the picture above from the shoot on her Facebook on Sunday. We expect to see the full advertisement campaign very soon.