These tests measure the levels of hCG (hormone emitted at the same time as pregnancy) in your pee. The sum of pee each test can recognize shifts largely. The sum of hormone each lady secret would moreover fluctuate, but not as largely. The preferable tests on the business sector will measure 25-50 mIUs of hCG, which is more often than not the product found in pee amidst the 4th and 5th weeks of pregnancy. The levels of hCG in your pee and lifeblood could be distinctive.