By Patricia Uyeh

Fitness model, Sarah Stage is 6-month pregnant and has incredibly tiny baby bump.

The pregnant model with a very toned physique is still slim and trim judging from the photos she put up on her Instagram page.

The 33-year-old Instagram star announced last month on Instagram that she was pregnant with her second child showing off a flat stomach and it has caused a stir on social media as her fans seem to more concerned than excited about her condition.

In her fitness e-book, she talked about how she maintains her physique before, during and after pregnancy.

However, in an Instagram post Tuesday, Sarah hit back at her critics, writing that her unborn baby is doing perfectly well. She went through the same backlash in 2015, when she was pregnant with her son, James. She gave birth in April of that year.

Photo credit: NYdailynews