LOINC
Version 2.66

18185-9Gestational ageActive

Component
Gestational age
Property
Time
Time
Pt
System
^Fetus
Scale
Qn
Method

Additional Names

Short Name
GA

Part Description

LP19507-0   Gestational age
The age of the conceptus, beginning from the time of fertilization. In clinical obstetrics, the gestational age is often estimated as the time from the last day of the last menstruation which is about 2 weeks before ovulation and fertilization. Source: National Library of Medicine, MeSH 2006

Basic Attributes

Class
OB.US
Type
Clinical
First Released
Version 1.0l
Last Updated
Version 2.40
Order vs. Observation
Observation
Common US Lab Results Rank
564
Common SI Lab Results Rank
564

Reference Information

Type Source Reference
Mapping Guidance Regenstrief Help This term is preferred over the two separate terms for gestational age in weeks [LOINC: 49051-6] and in days [LOINC: 49052-4] so that only one variable is used. Mapper’s Guide for the Top 2000 plus LOINC Laboratory Observations

Member of these Panels

LOINC Long Common Name
76478-7 Acetylcholinesterase panel - Amniotic fluid
58735-2 Alpha-1-Fetoprotein panel - Amniotic fluid
48802-3 Alpha-1-Fetoprotein panel - Serum or Plasma
75199-0 Congenital syphilis case investigation and report panel [CDC.CS]
49085-4 First and Second trimester integrated maternal screen panel
49085-4 First and Second trimester integrated maternal screen panel
48798-3 First trimester maternal screen panel - Serum or Plasma
49086-2 First trimester maternal screen with nuchal translucency panel
49087-0 Maternal screen clinical predictors panel
75547-0 Noninvasive prenatal fetal aneuploidy and microdeletion panel based on Plasma cell-free+WBC DNA by Dosage of chromosome-specific circulating cell free (ccf) DNA
48799-1 Second trimester penta maternal screen panel - Serum or Plasma
48800-7 Second trimester quad maternal screen panel - Serum or Plasma
35086-8 Second trimester triple maternal screen panel - Serum or Plasma

Member of these Groups

LG50112-8 Gestational ageTime^Fetus

Language Variants Get Info

zh-CNChinese (China)
孕龄:时间:时间点:^胎儿:定量型:
nl-NLDutch (Netherlands)
zwangerschapsduur:tijd:moment:^foetus:kwantitatief:
et-EEEstonian (Estonia)
Raseduse kestus:Aeg:Pt:^loode:Qn:
fr-BEFrench (Belgium)
Age gestationnel:Durée:Temps ponctuel:^Foetus:Quantitatif:
fr-FRFrench (France)
Gestational age:Time:Pt:^Fetus:Qn:
it-ITItalian (Italy)
Età gestazionale:Tempo:Pt:^feto:Qn:
pt-BRPortuguese (Brazil)
Idade gestacional:Tempo:Pt:^Feto:Qn:
ru-RURussian (Russian Federation)
Гестационный возраст:Время:ТчкВрм:^Плод:Колич:
es-ARSpanish (Argentina)
edad gestacional:tiempo:punto en el tiempo:^feto:cuantitativo:
es-ESSpanish (Spain)
Edad gestacional:Tiempo:Punto temporal:^Feto:Qn:
tr-TRTurkish (Turkey)
Doğurma yaşı:Süre:Zmlı:^Fetus:Kant:

Example Units

Unit Source
wk Example UCUM Units
week REGENSTRIEF

LOINC FHIR® API Example - CodeSystem Request Get Info

https://fhir.loinc.org/CodeSystem/$lookup?system=http://loinc.org&code=18185-9