sasha pivovarova pregnant nude.jpgSasha Pivovarova celebrated Mother's Day in the best way possible, by welcoming her first child into the world. The Russian model gave birth to a baby girl on Sunday and shared the news to her fans via Twitter.

"Today is my first day celebrating mother's day as a mommy! Happy mother's day to all mothers around the world :) Love, Sasha," she tweeted.

There is no news on a name yet, however the arrival of her newborn comes just two days after she released a semi-nude photo of her baby bump (pictured, left). Photographed by her husband Igor Vishnyakov, the striking image was believed to be taken at the eight or ninth month mark of her pregnancy. Unlike many of her counterparts, Sasha didn't pose while pregnant for a magazine cover or brand advertising campaign, she simply agree to have her portrait taken for personal use.

In the photo the 26-year-old looks incredible in just a simple pale floor-length skirt. Sasha announced in December that she was expecting her first child with hubby Igor. Fellow model Alessandra Ambrosio also recently welcomed her second child a boy they named Noah Phoenix. She and her fiancé Jamie Mazur have a three-year-old daughter Anja Louise. She posed naked while expecting for an ad campaign for Vivara jewellery.

Our congratulations go out to all the new mums and bubs!