Date of last known menstrual period
Gestational age assessment
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.
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.
Expected due date