I have not heard of using toothpaste to test for pregnancy, it is unfounded. The most commonly used clinical method to detect pregnancy is the early pregnancy test. If the menstrual cycle is very regular, and then about 30 days, in about 35 days after menopause can be measured pregnancy, if there are two red lines immediately go to the hospital to check the blood, if the early pregnancy test paper a dark and light may be a shorter period of time, there may be a late time of the bed, you can be measured after 3 days or go to the hospital directly to check the blood, if the test paper color is suddenly dark and light does not exclude the possibility of ectopic pregnancy or biochemical pregnancy. If the early pregnancy test paper only a line, may be the test paper is not sensitive, or may not be pregnant, the common method is early pregnancy test paper, but the hospital blood HCG is the gold standard, so it is recommended to go to the hospital to check the blood, the sensitivity will be higher.