How do you count the days of menstruation and periods?
Answer from: Artyom Artyomovich:
Hello. The menstrual cycle is the period from the beginning of one menstruation to the beginning of the next.
That is, the first day of the cycle is the first day of bleeding, the last day is the day before your next period starts. So, the number of days of delay is included in the cycle, if you have a violation of the normal duration of the cycle - you should consult a gynecologist to find out the reasons.