How many days of bleeding in an average menstrual cycle?

Menstrual bleeding lasts for between 3 to 5 days on average each cycle, i-asked-my-girlfriend-to-draw-what-was-happening--1301-1244032273-22however anywhere from 2 to 7 days is considered normal.

The average length of menstrual bleeding increases with age.

Absence of menstrual bleeding?

When a woman does not have a period, this can be caused by a failure to ovulate. It is common in women who are underweight (the body requires a certain level of body fat for reproduction and menstrual cycles to occur).

If a woman has never had menstrual bleeding, there may have been a problem with the normal development of the uterus or the vagina.

If a woman had menstrual cycles previously, but then stopped, this could be due to a problem with the uterus itself, like scar tissue inside the cavity, or may be due to premature menopause. If the uterus has not formed or if menopause has occurred, pregnancy is not possible. If the absence of menses is due to scar tissue inside the uterus, then this scar tissue will need to be removed as it can interfere with implantation.

Prolonged menstrual bleeding (more than 7 days)?

Prolonged bleeding generally indicates that either ovulation is not occurring regularly, there is something disrupting the lining of the uterus, or there is a problem forming blood clots. Intermenstrual bleeding or prolonged bleeding may be caused by polyps, fibroids, cancer or infection within the uterus or cervix. In these situations, should an embryo enter the uterus, implantation can be compromised resulting in lower pregnancy rates or an increased chance of a miscarriage.

menstrual cycle

http://www.ncbi.nlm.nih.gov/books/NBK56530/

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