Australian Government: Australian Institute of Health and Welfare METeOR Home Page

Pregnancy—first day of the last menstrual period, date DDMMYYYY

Identifying and definitional attributes

Metadata item type:Help on this termData Element
Short name:Help on this termFirst day of the last menstrual period
METeOR identifier:Help on this term270038
Registration status:Help on this termHealth, Standard 01/03/2005
Definition:Help on this termDate of the first day of the mother's last menstrual period (LMP).
Data Element Concept:Pregnancy—first day of the last menstrual period

Value domain attributes

Representational attributes

Representation class:Help on this termDate
Data type:Help on this termDate/Time
Format:Help on this termDDMMYYYY
Maximum character length:Help on this term8

Data element attributes

Collection and usage attributes

Guide for use:Help on this termIf the first day is unknown, it is unnecessary to record the month and year (i.e. record 99999999).
Comments:Help on this term

The first day of the LMP is required to estimate gestational age, which is a key outcome of pregnancy and an important risk factor for neonatal outcomes. Although the date of the LMP may not be known, or may sometimes be erroneous, estimation of gestational age based on clinical assessment may also be inaccurate. Both methods of assessing gestational age are required for analysis of outcomes.

Source and reference attributes

Submitting organisation:Help on this termNational Perinatal Data Development Committee

Relational attributes

Related metadata references:Help on this term

Is used in the formation of Female (pregnant)—estimated gestational age, total weeks NN Health, Superseded 02/12/2009

Supersedes First day of the last menstrual period, version 1, DE, NHDD, NHIMG, Superseded 01/03/2005.pdf (13.6 KB)

My items Help on this term
Download Help on this term