ask the gynecologist. but i suspect they are just doing a routine dipstick-type urine test for blood sugar infection etc. and they will have a urine specimen to check for pregnancy if necessary. it may be standing order. also it is good idea to have an empty bladder if you are going to have a good pelvic examination. you don't want someone pushing hard on your bladder area trying to fill your elusive ovaries when you have a full bladder.
why do women have to pee at the gyno?