What it means
The bleeding phase of the menstrual cycleMEN-stroo-ul SY-kulThe monthly series of hormone-driven changes in the ovaries and uterus that prepare the body for possible pregnancy.Full entry , when the uterine lining that built up during the cycle is shed because pregnancy did not happen. It usually lasts about 3 to 7 days, and cycles usually run 21 to 35 days. The first day of the last menstrual periodlast MEN-stroo-ul PEER-ee-udThe first day of a person's most recent menstrual period.Full entry (LMP) is used to date a pregnancy.
At a glance
| Also written | menstrual periods |
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Related terms
menstruation
The monthly shedding of the lining of the uterus, which leaves the body as blood through the vagina.
last menstrual period
The first day of a person's most recent menstrual period.
menstrual cycle
The monthly series of hormone-driven changes in the ovaries and uterus that prepare the body for possible pregnancy.