Alessandra Ambrosio poses pregnant and nude for jewelry advertisement

Pregnant Alessandra Ambrosio posed nude for the Brazilian jewelry company Vivara. Supermodel is due to become a mum for a second time in June and has chosen not to keep her baby bump under wraps, taking part in a revealing new ad campaign for Vivara instead.

In the black and white profile images, Ambrosio appears to be completely naked except for the jewels adorning her body and she poses with her right arm across her breasts to maintain her dignity, as she models three pricey rings on her fingers.

Ambrosio isn't the only pregnant star to embrace her nude form of late - Jessica Simpson stripped off for the cover of Elle magazine earlier this year to celebrate her first pregnancy.