Exactly how this woman made her baby bump disappear.

Pregnant women have been sharing videos of a breathing technique that almost makes their bumps disappear.

The “belly pump” videos are proving a hit on Instagram – with thousands of views.

A post shared by The Bloom Method™ (@thebloommethod) on Mar 20, 2017 at 3:16pm PDT

Spearheaded by a US fitness studio, The Bloom Method, the pumping is described as “diaphragmatic breathing with deep core engagement”.

But we just call it “wow”.

A post shared by The Bloom Method™ (@thebloommethod) on Jan 30, 2017 at 7:20am PST

Brooke Cates, from The Bloom Method, said on Instagram that “every expecting mother should be adding this to her daily regimen”.

She claims it decreases low back and pelvic pain and helps teach women how to push during labour.

A post shared by Becca Weaver (@farmerbecca37) on Feb 16, 2017 at 7:35pm PST

Fans of the studio have shared their belly pumping versions on Instagram.

A post shared by The Bloom Method™ (@thebloommethod) on Jan 2, 2017 at 9:00am PST

Cates claims the technique provides de-stressing signals to the unborn baby.

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