Drew Barrymore Goes BELLY OUT Over Pregnancy Rumors

One thing's for sure ... Drew Barrymore's definitely carrying a few extra pounds -- unfortunately, we're still not 100% sure if it's a baby or not.

Drew hit the streets of L.A. yesterday after a yoga class, wearing a form-fitting blue jersey (left) -- and by the looks of the side view, there's a real good chance her uterus is full of fetus.

It's the first good shot of Drew's belly since February -- when TMZ posted a pic of Drew clutching a sonogram on her way out of a Beverly Hills doctor's office (below).

So we gotta ask ...