Seriously I doubt it would make a difference. Would they go to the trouble and money trying to determine sex? If they aren't watching you pee, I wouldn't guess so. I'd be more careful about the proper temperature. Make sure she has tampon in when she gives the sample or the pee will be tinged pink. FYI! I don't know if anyone mentioned it but when a man's piss test comes up positive for pregancy it means he has prostate cancer.


:jointsmile: Bree
Bree1978 Reviewed by Bree1978 on . My sister is on her period!! WILL IT MATTER?? Ok pee test tommorow.. im COUNTING on my sister to pass this test!! If she is on her period can it mess with the test in any ways?? It aint a big ole lab test either.. Its just a simple piss, Flip, And wait cup.. Can it mess with the test? Rating: 5