an ultrasound???
I don't see why not.
A pregnant lady has a big stomach because as her baby grows, it takes up room in her uterus. It grows also larger if it is more than one baby. -IQ
There are a few medical reasons for women to get bloated stomachs while not being pregnant. Gas, accumulation of residue, hysterical pregnancy...
No that means she has a stomach ach. It is spelled ache by the way.