Super Fit Model Sarah Stage Shows Off Abs Just Days After Giving Birth

How?!

You could barely tell model Sarah Stage was pregnant before, and now that the baby has come, the evidence is basically gone.

NEWS: Super Fit Model Sarah Stage Welcomes Baby Boy

The new mama posted this picture on Instagram just days after giving birth, captioned, "4 days post baby. Total pregnancy weight gain was 28 pounds. I'm excited to resume my workouts in 5 weeks!! #JamesHunter #HealthyBaby #GrannyPanties"

The 30-year-old welcomed her baby boy James Hunter on April 15, at 8 lbs.
7 oz. and 22 inches long. Her rep told ET that the two are doing well.

PHOTOS: Model Sarah Stage Stays So Fit You Can Barely Tell She's 8 1/2 Months Pregnant

Every pregnancy is different, but Sarah has gained a lot of attention during her well-documented pregnancy for how little she was showing.

Here she is at eight months.

8-1/2 months.

And finally, just 10 days before the baby was due.

That's pretty unusual! But all that really matters is that mama and baby are healthy and happy.