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

Identifying and definitional attributes

Metadata item type:Help on this termData Element
Short name:Help on this termPregnancy duration at the first antenatal care visit
Synonymous names:Help on this termEstimated pregnancy gestation in completed weeks at the first visit for antenatal care.
METEOR identifier:Help on this term379597
Registration status:Help on this term
  • Health, Superseded 02/08/2017
  • Indigenous, Superseded 22/10/2018
  • Tasmanian Health, Superseded 03/07/2020
Definition:Help on this term

The total number of completed weeks of a pregnancy's estimated duration on the day of the first visit for antenatal care.

Data Element Concept:Pregnancy—estimated duration

Value domain attributes

Representational attributes

Representation class:Help on this termTotal
Data type:Help on this termNumber
Format:Help on this termN[N]
Maximum character length:Help on this term2
Supplementary values:Help on this term
ValueMeaning
99Not stated/unknown
Unit of measure:Help on this termCompleted weeks

Data element attributes

Collection and usage attributes

Guide for use:Help on this term

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 contact if it was to confirm the pregnancy only or those contacts that occurred during the pregnancy that related to other 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:Help on this term

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:Help on this term

National Perinatal Data Development Committee

Relational attributes

Related metadata references:Help on this term
Has been superseded by Pregnancy—estimated duration (at the first visit for antenatal care), completed weeks N[N]
  • ACT Health (retired), Candidate 14/08/2018
  • Health, Superseded 12/12/2018
  • Indigenous, Superseded 02/04/2019
See also Product of conception—gestational age, completed weeks N[N]
  • Health, Superseded 02/08/2017
  • Tasmanian Health, Superseded 03/07/2020
Implementation in Data Set Specifications:Help on this term
All attributes +

Indigenous primary health care DSS 2015-17Health, Superseded 25/01/2018
Indigenous, Superseded 27/02/2018

DSS specific attributes +

Implementation start date: 01/07/2015

Implementation end date: 30/06/2017

DSS specific information:

This item is only collected for women who gave birth during the preceding 12 months.


Indigenous primary health care NBEDS 2017–18Health, Superseded 06/09/2018
Indigenous, Superseded 22/10/2018

DSS specific attributes +

Implementation start date: 01/07/2017

Implementation end date: 30/06/2018

DSS specific information:

This item is only collected for women who gave birth during the preceding 12 months.


Perinatal NMDS 2010-2011Health, Superseded 21/12/2010

DSS specific attributes +

Implementation start date: 01/07/2010

Implementation end date: 30/06/2011

DSS specific information:

This item is collected for the mother only.

Perinatal NMDS 2011-12Health, Superseded 07/03/2012

DSS specific attributes +

Implementation start date: 01/07/2011

Implementation end date: 30/06/2012

DSS specific information:

This item is collected for the mother only.

Perinatal NMDS 2012-13Health, Superseded 07/02/2013

DSS specific attributes +

Implementation start date: 01/07/2012

Implementation end date: 30/06/2013

DSS specific information:

This item is collected for the mother only.

Perinatal NMDS 2013-14Health, Superseded 07/03/2014

DSS specific attributes +

Implementation start date: 01/07/2013

Implementation end date: 30/06/2014

DSS specific information:

This item is collected for the mother only.


Perinatal NMDS 2014-18Health, Superseded 02/08/2017

DSS specific attributes +

Implementation start date: 01/07/2014

Implementation end date: 30/06/2018

DSS specific information:

This item is collected for the mother only.


Tasmanian Perinatal Data Set - 2016Tasmanian Health, Standard 30/01/2017

DSS specific attributes +

Implementation start date: 01/07/2016

Implementation end date: 30/06/2017


Tasmanian Perinatal Data Set - 2019Tasmanian Health, Superseded 23/06/2020

DSS specific attributes +

Implementation start date: 01/07/2019

Implementation end date: 30/06/2020


Implementation in Indicators:Help on this term
Used as Numerator

Australian Health Performance Framework: PI 2.1.2–Females with an antenatal visit in the first trimester of pregnancy, 2019Health, Standard 09/04/2020

Indigenous primary health care: PI13a-Number of regular clients who had their first antenatal care visit within specified periods, 2013Health, Superseded 21/11/2013
Indigenous, Superseded 21/11/2013

Indigenous primary health care: PI13a-Number of regular clients who had their first antenatal care visit within specified periods, 2014Health, Superseded 13/03/2015
Indigenous, Superseded 13/03/2015

Indigenous primary health care: PI13a-Number of regular clients who had their first antenatal care visit within specified periods, 2015Health, Superseded 05/10/2016
Indigenous, Superseded 20/01/2017

Indigenous primary health care: PI13a-Number of regular clients who had their first antenatal care visit within specified periods, 2015-2017Health, Superseded 25/01/2018
Indigenous, Superseded 27/02/2018

Indigenous primary health care: PI13a-Number of regular clients who had their first antenatal care visit within specified periods, 2015-2017Health, Superseded 17/10/2018
Indigenous, Superseded 17/10/2018

Indigenous primary health care: PI13b-Proportion of regular clients who had their first antenatal care visit within specified periods, 2013Health, Superseded 21/11/2013
Indigenous, Superseded 21/11/2013

Indigenous primary health care: PI13b-Proportion of regular clients who had their first antenatal care visit within specified periods, 2014Health, Superseded 13/03/2015
Indigenous, Superseded 13/03/2015

Indigenous primary health care: PI13b-Proportion of regular clients who had their first antenatal care visit within specified periods, 2015Health, Superseded 05/10/2016
Indigenous, Superseded 20/01/2017

Indigenous primary health care: PI13b-Proportion of regular clients who had their first antenatal care visit within specified periods, 2015-2017Health, Superseded 17/10/2018
Indigenous, Superseded 17/10/2018

Indigenous primary health care: PI13b-Proportion of regular clients who had their first antenatal care visit within specified periods, 2015-2017Health, Superseded 25/01/2018
Indigenous, Superseded 27/02/2018

National Core Maternity Indicators: PI 02-Antenatal care in the first trimester for all women giving birth (2013)Health, Superseded 02/02/2016

National Core Maternity Indicators: PI 02—Antenatal care in the first trimester for all women giving birth (2016)Health, Superseded 06/09/2018

National Core Maternity Indicators: PI 02–Antenatal care visits in the first trimester for all females giving birth, 2018Health, Superseded 19/06/2019

National Core Maternity Indicators: PI 02–Antenatal care visits in the first trimester for all females giving birth, 2019Health, Superseded 16/09/2020

National Core Maternity Indicators: PI 02–Antenatal care visits in the first trimester for all females giving birth, 2020Health, Superseded 17/12/2021

National Health Performance Authority Healthy Communities: Percentage of women who gave birth and had at least one antenatal visit in the first trimester, 2010–2011 National Health Performance Authority (retired), Retired 01/07/2016

National Health Performance Authority Healthy Communities: Percentage of women who gave birth and had at least one antenatal visit in the first trimester, 2010–2011 National Health Performance Authority (retired), Retired 01/07/2016

National Indigenous Reform Agreement: PI 09-Antenatal care, 2013Indigenous, Superseded 13/12/2013

National Indigenous Reform Agreement: PI 09-Antenatal care, 2014Indigenous, Superseded 24/11/2014

National Indigenous Reform Agreement: PI 09-Antenatal care, 2015Indigenous, Superseded 18/11/2015

National Indigenous Reform Agreement: PI 09—Antenatal care, 2016Indigenous, Superseded 01/07/2016

National Indigenous Reform Agreement: PI 09—Antenatal care, 2017Indigenous, Superseded 06/06/2017

National Indigenous Reform Agreement: PI 09-Antenatal care, 2018Indigenous, Superseded 31/07/2018

National Indigenous Reform Agreement: PI 09-Antenatal care, 2019Indigenous, Superseded 23/08/2019

National Indigenous Reform Agreement: PI 09-Antenatal care, 2020Indigenous, Standard 23/08/2019

National Indigenous Reform Agreement: PI 14-Antenatal care, 2012Indigenous, Superseded 13/06/2013

Used as Denominator

Australian Health Performance Framework: PI 2.1.2–Females with an antenatal visit in the first trimester of pregnancy, 2019Health, Standard 09/04/2020

National Core Maternity Indicators: PI 02–Antenatal care visits in the first trimester for all females giving birth, 2018Health, Superseded 19/06/2019

National Core Maternity Indicators: PI 02–Antenatal care visits in the first trimester for all females giving birth, 2019Health, Superseded 16/09/2020

National Core Maternity Indicators: PI 02–Antenatal care visits in the first trimester for all females giving birth, 2020Health, Superseded 17/12/2021

National Health Performance Authority Healthy Communities: Percentage of women who gave birth and had at least one antenatal visit in the first trimester, 2010–2011 National Health Performance Authority (retired), Retired 01/07/2016

National Health Performance Authority Healthy Communities: Percentage of women who gave birth and had at least one antenatal visit in the first trimester, 2010–2011 National Health Performance Authority (retired), Retired 01/07/2016

National Indigenous Reform Agreement: PI 09-Antenatal care, 2013Indigenous, Superseded 13/12/2013

National Indigenous Reform Agreement: PI 09-Antenatal care, 2014Indigenous, Superseded 24/11/2014

National Indigenous Reform Agreement: PI 09-Antenatal care, 2015Indigenous, Superseded 18/11/2015

National Indigenous Reform Agreement: PI 09—Antenatal care, 2016Indigenous, Superseded 01/07/2016

National Indigenous Reform Agreement: PI 09—Antenatal care, 2017Indigenous, Superseded 06/06/2017

National Indigenous Reform Agreement: PI 09-Antenatal care, 2018Indigenous, Superseded 31/07/2018

National Indigenous Reform Agreement: PI 09-Antenatal care, 2019Indigenous, Superseded 23/08/2019

National Indigenous Reform Agreement: PI 09-Antenatal care, 2020Indigenous, Standard 23/08/2019

National Indigenous Reform Agreement: PI 14-Antenatal care, 2012Indigenous, Superseded 13/06/2013

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