nine months with nothing to do
 

I'd be yawning too

http://www.sciencedaily.com/releases/2012/11/121121210334.htm

BTW, 4D is 3D plus time.

I've seen them hiccup. A yawn isn't to far off from that.

A hiccup with your lungs full of liquid must be rather painful. . .:eek:

Maybe they're just bored because mom is laying on her back for hrs at a time. Would they yawn if mom was jogging?

One would think, but they still do it.

Good questions.

I would say so, I find jogging quite boring.

I've never been to excited about jogging either.

But when mom is lying on her back, her fetus has to avoid her backbone. Choices, choices. . .

Haha, it must be quite an experience, to be staying inside...someone.

I prefer skipping. Having a five year old little girl I do a lot of that.