To test for pregnancy using bleach, pour it into a cup with fresh urine. If the solution turns fizzy, frothy, or starts bubbling, it indicates pregnancy. If the solution does nothing, you are not pregnant. Much like other homemade tests, there is no instruction as to how much bleach to add to how much urine or how much time to wait for the results. There is, however, a precautionary warning when using this type of test. When mixed with urine, bleach produces harmful gasses that could be harmful to you and your potential baby if inhaled. Be sure that when you perform this type of homemade test, you head outside to do it so that you limit your chances of inhaling the dangerous fumes. xx