Is a 45 day menstrual cycle normal?
On One Hand: Normal Menstrual CycleAccording to the medical textbook “Williams Gynecology,” the typical menstrual cycle is defined as 21 to 35 days, with menstrual flow lasting two to six days. The average blood loss of normal menstrual flow is 20 to 60 milliliters. A menstrual cycle with an interval less than 21 days is described as polymenorrhea, and a cycle with an interval longer than 35 days is described as oligomenorrhea. Menstrual flow in excess of 80 milliliters is considered to be abnormal and is called menorrhagia.On the Other: Cycle VariationThe menstrual cycle interval is different among women, and it can also vary throughout an individual woman’s reproductive life. A study of more than 2,700 women led by Dr. Alan E. Treolar of the Center for the Advancement of Reproductive Health at the University of North Carolina found that menstrual cycle length is least variable between 20 and 40 years of age and is most irregular in the two years after the start of menstruation (rangi
