Navigate Up
Sign In

Date of last known menstrual period

Data Item category

Gestational age assessment

Collections containing the item

Data definitions

S/T Perinatal Data Collections:
QLD: The day, month and year of the first day of the mother's last menstrual period. SA: The day, month and year of the first day of the last normal menstrual period. OTHER S/T: No definition specified. SA, ACT: Births and Deaths Registration Collections: First day of last menstrual period. NSW: First day of last menstrual period or if unknown completed weeks of pregnancy.

Additional information

WA also collect certainty of the date but LMP is not a mandatory field. QLD collects "LMP estimated yes/no". NSW RCA only collects this item for prenatal notifications. Births and Deaths Registration Collections only collect this item for stillbirths (Birth Register) and neonatal deaths (Death Register). Tas PDC collects this information in Obstetrix Tas, a statewide Electronic Perinatal Database that is used in public maternity and publically contracted private hospitals throughout Tasmania.

Related items

Expected due date

Maternity Information Matrix © 2011-2014 Australian Institute of Health and Welfare and University of New South Wales | Copyright information | Disclaimer