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last menstrual period

The first day of a person's most recent menstrual period.

last MEN-stroo-ul PEER-ee-ud noun

What it means

A date asked of people who menstruate. In pregnancy it is used to work out how far along the pregnancy is and the due date (EDDee-dee-DEE (said as letters)Estimated date of delivery: the expected due date of a pregnancy.Full entry ): a pregnancy is counted from the first day of the LMP, about two weeks before conception. It is also asked before surgery, x-rays and some drugs, to judge whether the client could be pregnant.

For the nurse

Ask for the first day of the last period, not the last day, and whether periods are regular.

In a chart

"LMP 08/04; G2 P1; pregnancy test ordered before CT."

At a glance

AbbreviationsLMP
Spanishfecha de la última menstruación (FUM)
Also writtenLMP

Related terms

prenatal care

Health care for a pregnant person and the unborn baby during pregnancy, before birth.

men/o

A word part that means menstruation or month.

EDD

Estimated date of delivery: the expected due date of a pregnancy.

pregnancy

The time during which an embryo, then a fetus, develops inside the uterus, from conception to birth.

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