hmm...yea that would suck if you were a girl and had to go...hate to have on lots of layers and have to take them off really fast if you got to go...
anyways..

here is a link to the description of urine...now, from reading it the only difference in it would be some not needed minerals as you see listed in the link..however, the amount would be dependant on you...i would still say that our urine and other mammals are around 90% simular but the small differences are just the minerals...but again like they stated before there is no reason to relate our urine to danger...anyways here is the link...

http://en.wikipedia.org/wiki/Urine