The day after menstruation, if you have sex using withdrawal method, do you need to take birth control pills?

Patient's question:

Is it true that taking birth control pills prevents pregnancy? Should I take them in my situation?

Doctor's answer:

Hello! If your menstrual cycle is regular, the possibility of pregnancy during intercourse at this time is very small, and medication can be avoided.
Advice: Generally, the safe period is about eight days after the end of menstruation, and the lower the likelihood of pregnancy, the closer it is to the menstrual period. You can refer to your own menstrual cycle.