Pregnancy—estimated duration (at the first visit for antenatal care), completed weeks N[N]

Identifying and definitional attributes

Metadata item type:Data Element
Short name:Pregnancy duration at the first antenatal care visit
Synonymous names:Estimated pregnancy gestation in completed weeks at the first visit for antenatal care.
METeOR identifier:673258
Registration status:Health, Superseded 12/12/2018
Indigenous, Archived 02/04/2019
ACT Health, Final 14/08/2018
Definition:

The estimated duration of a pregnancy in total completed weeks, on the day of the first visit for antenatal care.

Data Element Concept:Pregnancy—estimated duration

Value domain attributes

Representational attributes

Representation class:Total
Data type:Number
Format:N[N]
Maximum character length:2
Supplementary values:
ValueMeaning
99Not stated/unknown
Unit of measure:Completed weeks

Data element attributes

Collection and usage attributes

Guide for use:

The day of the first visit for antenatal care is the day of the first contact with a midwife, medical practitioner, or other recognised health professional where antenatal care was provided. It does not include a visit where the sole purpose of contact is to confirm the pregnancy, or those contacts that occurred during the pregnancy that related solely to non-pregnancy related issues. It does not include a first contact after the onset of labour.

Antenatal care visits are attributed to the pregnant woman. The duration of the pregnancy on that day is the same as the gestational age of the fetus or baby on that day.

Collection methods:

To be collected at any time during the pregnancy or birth episode after the best estimate of gestational age has been determined.

The method of data collection will usually be from health records of pregnancy and/or birth.

The valid range of completed weeks for pregnancy duration at the first visit for antenatal care is 3–46.

Source and reference attributes

Submitting organisation:

National Perinatal Data Development Committee

Relational attributes

Related metadata references:

Supersedes Pregnancy—estimated duration (at the first visit for antenatal care), completed weeks N[N] Health, Superseded 02/08/2017, Tasmanian Health, Archived 03/07/2020, Indigenous, Archived 22/10/2018

Has been superseded by Pregnancy—estimated duration of pregnancy at the first antenatal care visit, total completed weeks N[N] Health, Standard 12/12/2018, Tasmanian Health, Endorsed 03/07/2020, Indigenous, Endorsed 02/04/2019

See also Product of conception—gestational age, completed weeks N[N] Health, Superseded 12/12/2018, ACT Health, Final 14/08/2018

Implementation in Data Set Specifications:
All attributes +

Indigenous primary health care NBEDS 2018–19 Health, Superseded 12/12/2018
Indigenous, Archived 02/04/2019

DSS specific attributes +

Perinatal NMDS 2018-19 Health, Superseded 12/12/2018
ACT Health, Final 14/08/2018

DSS specific attributes +
Implementation in Indicators:Used as numerator
Indigenous primary health care: PI13a-Number of regular clients who had their first antenatal care visit within specified periods, 2018-2019 Health, Superseded 16/01/2020
Indigenous, Endorsed 17/10/2018
Indigenous primary health care: PI13b-Proportion of regular clients who had their first antenatal care visit within specified periods, 2018-2019 Health, Superseded 16/01/2020
Indigenous, Endorsed 17/10/2018
National Core Maternity Indicators: PI 02–Antenatal care visits in the first trimester for all females giving birth, 2020 Health, Standardisation pending 06/08/2020
Used as denominator
National Core Maternity Indicators: PI 02–Antenatal care visits in the first trimester for all females giving birth, 2020 Health, Standardisation pending 06/08/2020