Does the appearance of bleeding always exclude pregnancy?

In the case of pregnancy, bleeding stops - both in patients using contraception and those not taking hormonal contraceptives. The occurrence of menstrual bleeding or withdrawal bleeding indicates the absence of pregnancy. It is very rare to have bleeding at the time of menstruation or withdrawal bleeding despite pregnancy. In pregnancy, bleeding stops due to the action of pregnancy hormones secreted by the body in connection with the implantation of the embryo. When used correctly, birth control pills are approximately 99% effective. If you are using them properly and you are bleeding from withdrawal, there is no reason to believe that pregnancy may have occurred. I encourage you to read the following thread: https://www.gdziepolek.pl/opinie-i-pytania/24161/czy-jest-mozliwe-aby-w-przypadku-ciazy-doszlo-do-krwawienia-z-odstawienia I attach additional information: https://www.gdziepolek.pl/artykuly/jak-prawidlowo-stosowac-antykoncepcje