The number of days a girl’s menstrual cycle lasts depends on the individual’s physical condition and is related to factors such as heredity. Some people have a shorter period and a smaller amount of menstruation, which can end in about 2-3 days. This part of the girl ovary function is also very healthy, can have normal endocrine, also have normal mature follicle discharge egg, every month have normal regular menstrual cycle, are normal, does not affect the health, also does not affect the fertility. Some women, due to genetic and endocrine influences, have relatively longer menstrual cycles, which take about 1 week to end, and have heavier menstrual flow, which is normal as long as the menstruation is regular. Most women’s menstruation can end in about 3-5 days, and the amount of menstruation is not too large, and there are no symptoms such as menstrual cramps.