Monthly Periods

Monthly periods are defined as the time interval between two episodes of menses.
  • The monthly periods are termed as menstruation and bodily changes that occur monthly in fertile women to facilitate the process of pregnancy. It occurs in women between the average reproductive age group of 12 to 50 years and a good symptom of general reproductive health.
  • Regular monthly periods reflects a secretion of a normal chemical substance by the female glands and signal having female hormone like estrogen on board, which in turn maintains bone mineral health, affects central nervous system function, and many other functions. A secretion of female sex hormones tightly regulates the system of controlling female reproduction process which could be reflected in regular monthly periods.
  • The starting of first menses (menarche) typically occurs between the ages of 10 and 16 years old. It is generally irregular and do not release eggs during menstruation for the first several years after first menses, reaching a regular length and duration by 5 to 7 years after the first menses.
  • The average monthly periods length is between 24 and 32 days and a normal cycle is considered to be 28 days.
  • Menstrual bleeding lasts 3 to 6 days in most women, although there is a variation in cycle length from 2 to 12 days after the start of releasing of eggs from woman’s ovaries. Longer periods (>8 days) are associated with irregular menstruation or no periods at all.
  • The heaviest flow is commonly on day 2 of the cycle. The average blood loss per cycle is between 37 and 43 ml, and the upper limit for menstrual loss is taken as 80 ml per menses.
  • The duration and amount of bleeding declines slightly (by about half a day per cycle) in women over age 35. Also women getting menopause (i.e. time when a woman stops having periods and is no longer able to get pregnant naturally) often experience significantly heavier bleeding than younger women.
  • Women will experience from 300 to 400 monthly periods in her lifetime; cycle length is controlled by the rate and quality of egg growth and development which varies in individual women.

*PMS Premenstrual Syndrome

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