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:	379597
Registration status:	Health, Superseded 02/08/2017 Indigenous, Superseded 22/10/2018 Tasmanian Health, Superseded 03/07/2020
Definition:	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:	Total weeks N[N]

Value domain attributes
Representational attributes
Representation class:	Total
Data type:	Number
Format:	N[N]
Maximum character length:	2
	Value	Meaning
Supplementary values:	99	Not 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 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:	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Related metadata references:	Has been superseded by Pregnancy—estimated duration (at the first visit for antenatal care), completed weeks N[N] Health, Superseded 12/12/2018 Indigenous, Superseded 02/04/2019 See also Product of conception—gestational age, completed weeks N[N] Health, Superseded 02/08/2017 Tasmanian Health, Superseded 03/07/2020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: All attributes +	Indigenous primary health care DSS 2015-17 Health, 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 2017–18 Health, 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 2010-2011 Health, 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 2011-12 Health, 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 2012-13 Health, 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 2013-14 Health, 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 2014-18 Health, 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 - 2016 Tasmanian Health, Standard 30/01/2017 DSS specific attributes + Implementation start date: 01/07/2016 Implementation end date: 30/06/2017 Tasmanian Perinatal Data Set - 2019 Tasmanian Health, Superseded 23/06/2020 DSS specific attributes + Implementation start date: 01/07/2019 Implementation end date: 30/06/2020
Implementation in Indicators:	Used as Numerator Australian Health Performance Framework: PI 2.1.2–Females with an antenatal visit in the first trimester of pregnancy, 2019 Health, Superseded 01/12/2020 Indigenous primary health care: PI13a-Number of regular clients who had their first antenatal care visit within specified periods, 2013 Health, 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, 2014 Health, 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, 2015 Health, 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, 2015-2017 Health, 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, 2015-2017 Health, 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, 2013 Health, 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, 2014 Health, 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, 2015 Health, 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, 2015-2017 Health, Superseded 25/01/2018 Indigenous, Superseded 27/02/2018 Indigenous primary health care: PI13b-Proportion of regular clients who had their first antenatal care visit within specified periods, 2015-2017 Health, Superseded 17/10/2018 Indigenous, Superseded 17/10/2018 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, 2018 Health, Superseded 19/06/2019 National Core Maternity Indicators: PI 02–Antenatal care visits in the first trimester for all females giving birth, 2019 Health, Superseded 16/09/2020 National Core Maternity Indicators: PI 02–Antenatal care visits in the first trimester for all females giving birth, 2020 Health, 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, 2013 Indigenous, Superseded 13/12/2013 National Indigenous Reform Agreement: PI 09-Antenatal care, 2014 Indigenous, Superseded 24/11/2014 National Indigenous Reform Agreement: PI 09-Antenatal care, 2015 Indigenous, Superseded 18/11/2015 National Indigenous Reform Agreement: PI 09—Antenatal care, 2016 Indigenous, Superseded 01/07/2016 National Indigenous Reform Agreement: PI 09—Antenatal care, 2017 Indigenous, Superseded 06/06/2017 National Indigenous Reform Agreement: PI 09-Antenatal care, 2018 Indigenous, Superseded 31/07/2018 National Indigenous Reform Agreement: PI 09-Antenatal care, 2019 Indigenous, Superseded 23/08/2019 National Indigenous Reform Agreement: PI 09-Antenatal care, 2020 Indigenous, Standard 23/08/2019 National Indigenous Reform Agreement: PI 14-Antenatal care, 2012 Indigenous, 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, 2019 Health, Superseded 01/12/2020 National Core Maternity Indicators: PI 02–Antenatal care visits in the first trimester for all females giving birth, 2018 Health, Superseded 19/06/2019 National Core Maternity Indicators: PI 02–Antenatal care visits in the first trimester for all females giving birth, 2019 Health, Superseded 16/09/2020 National Core Maternity Indicators: PI 02–Antenatal care visits in the first trimester for all females giving birth, 2020 Health, 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, 2013 Indigenous, Superseded 13/12/2013 National Indigenous Reform Agreement: PI 09-Antenatal care, 2014 Indigenous, Superseded 24/11/2014 National Indigenous Reform Agreement: PI 09-Antenatal care, 2015 Indigenous, Superseded 18/11/2015 National Indigenous Reform Agreement: PI 09—Antenatal care, 2016 Indigenous, Superseded 01/07/2016 National Indigenous Reform Agreement: PI 09—Antenatal care, 2017 Indigenous, Superseded 06/06/2017 National Indigenous Reform Agreement: PI 09-Antenatal care, 2018 Indigenous, Superseded 31/07/2018 National Indigenous Reform Agreement: PI 09-Antenatal care, 2019 Indigenous, Superseded 23/08/2019 National Indigenous Reform Agreement: PI 09-Antenatal care, 2020 Indigenous, Standard 23/08/2019 National Indigenous Reform Agreement: PI 14-Antenatal care, 2012 Indigenous, Superseded 13/06/2013