What are the chances of an unplanned pregnancy? An unplanned pregnancy usually refers to a pregnancy that was not planned, prepared, or taken. Although birth control can reduce the chance of pregnancy, it is not 100% reliable because many factors can affect the chance of pregnancy. This article will explore the factors that affect the probability of unintended pregnancy from the following four aspects. Different contraceptive methods have different effects. For women, contraceptive methods such as oral contraceptive pills, contraceptive rings and contraceptive pills are commonly used. For men, condoms are one of the common contraceptive methods. These contraceptive methods