I, in a way disagree with your opinion on intelligender..... Im not saying that it is 100 percent accurate, but the directions clearly tell you that they donot recommend the drinking of any fluids before taking the test. You may be right, it probably could be used as a PH level test, but however the full purpose of this is to find out the gender of your unborn baby, not your PH level. I bought one of the tests and I followed the directions percisely with using my 1st morning's urine and everything, I will not know for sure if it was accurate with me until October 22nd. But I do recall reading the questions and answers section on the direction sheet and it said that they didnot want you to intake fluids before the test because it could provide a negative result, so if you did get 2 different results that may explain why, because the directions werent followed as they stated they wanted each individual to follow them. No offense, it's just my opinion and your opinion is also a good one.