Having two periods in one month can either constitute peculiarities of a regular menstrual cycle or an evidence of a number of functional disorders and diseases of the female reproductive system.
When do two periods a month represent a specific feature of a regular menstrual cycle?
The term menstrual cycle refers to the time interval starting from the first day of one menstruation until the first day of the next menses (and not the interval between periods). A menstrual cycle averages out at 28 days. Even in this case, a woman can observe two menses in one calendar month (for example, if the first menstruation started on the 1st day of the month and the next one – on the 28th day). However, a regular menstrual cycle may comprise from 21 to 35 days. Thus, as long as the patient has periods every 3 weeks on a regular basis, bleeding continues for no longer than 7 days, it is of moderate intensity and does not lead to anemia, then having two periods in a month can be considered an individual feature of the woman’s organism. Understandably, this condition does not require medical intervention.
When does having two periods in one month testify to a certain pathology?
Too close periods require medical examination in the following cases :
-The menstrual cycle (starting from the first day of one menstruation until the first day of the next menses) comprises less than 21 days;