Pregnancy—estimated duration of pregnancy at the first antenatal care visit, total completed weeks N[N]
Data Element Attributes
Identifying and definitional attributes | |
Metadata item type: | Data Element |
|---|---|
| Short name: | Pregnancy duration at the first antenatal care visit |
| Synonymous names: | Estimated gestational age in completed weeks at first antenatal care visit |
| METEOR identifier: | 695410 |
| Registration status: | Health, Superseded 03/12/2020 Indigenous, Superseded 14/07/2021 Tasmanian Health, Superseded 24/03/2023 |
| Definition: | The estimated duration of a pregnancy in total completed weeks on the day of the first antenatal care visit. |
| Data Element Concept: | Pregnancy—estimated duration of pregnancy at the first antenatal care visit |
| 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 antenatal care visit is the day of the first contact with a midwife, clinician, 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 female. The duration of a pregnancy on the day of the first antenatal care visit is the same as the best estimate of gestational age of the fetus or baby. There may be one or more revisions of pregnancy duration after the first antenatal care visit if a better estimate of gestational age of the fetus or baby becomes available. Revised estimates are not usually applied retrospectively in antenatal records. The best estimate of pregnancy duration is used to record the gestation at later antenatal care visits and to assign gestational age to the baby recorded at the time of birth. If gestational age has been revised, a similar revision will need to be applied to earlier recorded estimates of pregnancy duration. Alternatively the pregnancy duration on a specified day can be calculated from the gestational age of the baby at birth. |
|---|---|
| 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 antenatal care visit is 3 to 46 weeks. |
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 12/12/2018 Indigenous, Superseded 02/04/2019 Has been superseded by Pregnancy—estimated duration of pregnancy at the first antenatal care visit, total completed weeks N[N] Health, Standard 03/12/2020 Indigenous, Standard 14/07/2021 Tasmanian Health, Standard 24/03/2023 See also Product of conception—gestational age, total completed weeks N[N] Health, Standard 12/12/2018 Tasmanian Health, Standard 03/07/2020 |
| Implementation in Data Set Specifications: | Indigenous primary health care NBEDS 2019–20 Health, Superseded 16/01/2020 Indigenous, Superseded 14/07/2021 Tasmanian Perinatal Data Set - 2020 Tasmanian Health, Superseded 23/11/2023 Tasmanian Perinatal Data Set - 2021 Tasmanian Health, Superseded 23/11/2023 Tasmanian Perinatal Data Set - 2022 Tasmanian Health, Superseded 23/11/2023 |
| 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, June 2020 Health, Retired 13/10/2021 Indigenous, Superseded 14/07/2021 Indigenous primary health care: PI13b-Proportion of regular clients who had their first antenatal care visit within specified periods, June 2020 Health, Retired 13/10/2021 Indigenous, Superseded 14/07/2021 National Core Maternity Indicators: PI 02–Antenatal care visits in the first trimester for all females giving birth, 2021 Health, Superseded 09/09/2022 National Core Maternity Indicators: PI 02–Antenatal care visits in the first trimester for all females giving birth, 2022 Health, Superseded 14/07/2023
Used as Denominator
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