Originally posted by: Armu4eva
This logic suffices.. I don't think its a big issue
In very rare cases, you can have a false-positive result. This means you're not pregnant but the test says you are. You could have a false-positive result if you have blood or protein in your pee. Certain drugs, such as tranquilizers, anticonvulsants, hypnotics, and fertility drugs, could cause false-positive results.
Yes, it can happen, but it is statistically very low. Or it would affect the sales of the kits so much that the companies would shut down.