How long after taking birth control pills might you get pregnant if you don't have your period?

Patient's question:

No

Doctor's answer:

After taking emergency contraception pills, there are certain changes in the menstrual cycle, such as causing menstrual disorders, prolonged bleeding, etc. It may also lead to common side effects like nausea, vomiting, headache, dizziness, fatigue, breast swelling, bleeding, and more. Since the dosage of emergency contraception pills is more than ten times that of regular birth control pills, they use high doses of medication to interfere with the function of the ovaries and control ovulation. As a result, they can cause harm to the female's ovarian function, liver and kidney metabolism, and other systems. This harm can sometimes be difficult to estimate. Generally, if the menstrual period is more than 7 days later than normal, it is recommended to go to the hospital for related examinations to confirm the possibility of pregnancy.