Bleeding a week after taking the pill is known as withdrawal bleeding in clinical practice, which is a normal effect of the drug.
Clinical contraceptives mainly include emergency contraceptives short-acting contraceptives and long-acting contraceptives, generally according to the course of short-acting contraceptives and long-acting contraceptives will not cause abnormal bleeding performance, if you take emergency contraceptives will show withdrawal bleeding.
Because the emergency contraceptive pill contains a large dose of progesterone and then take it, after stopping the pill, progesterone will retreat, which will cause the endothelium to peel off, resulting in bleeding, and this performance is similar to the female menstruation.
The principle of emergency contraceptive pills is to inhibit female ovulation, prevent fertilization or prevent the fertilization of the egg. However, this type of medication is an after-the-fact remedy and should not be used as a regular contraceptive method, otherwise it can easily disrupt the hormonal profile of a woman’s body and even cause infertility.
When taking birth control pills, women must follow the instructions, because different types of birth control pills can be taken in different ways and at different times. If you take the pill at the wrong time or in the wrong way, it may cause contraceptive failure.