After cohabitation, if menstruation comes the next day, will pregnancy occur?

Patient's question:

I had my period the day after sleeping in the same room with my boyfriend. After that, I haven't had my period for 40 days. Could I be pregnant?

Doctor's answer:

Your menstrual cycle is quite regular, so this situation can be confirmed as your menstruation. Therefore, you are not pregnant, and you don't need to worry too much. If you were pregnant, you would not have your period. Although the 7 days before and 8 days after the onset of menstruation are considered the safe period, there is no absolute safe period. If you do not plan to have children, it is best to still take contraceptive measures even during the safe period. Wishing you good health!

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