evidence: Homemade pregnancy tests like the bleach pregnancy test claim to be able to detect the pregnancy hormone by mixing urine with a household chemical like bleach. [...] Advocates of the bleach pregnancy test claim that if the bleach and urine mix is foamy, a woman is pregnant. If it's not foamy, the woman is not pregnant. However, this isn't a proven fact. [...] Most pregnancy tests will have you place the end of the dipstick in your urine stream. A few minutes later, the dipstick will show the results as a plus or minus sign, one or two lines, or the words "pregnant" or "not pregnant".