Version 2.78

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

Reference Information

Type Source Reference
Article NCBI PubMed Altman DG, Chitty LS. New charts for ultrasound dating of pregnancy. Ultrasound Obstet Gynecol. 1997 Sep;10(3):174-91. Link to PubMed

Fully-Specified Name

Component
Gestational age
Property
Time
Time
Pt
System
^Fetus
Scale
Qn
Method
US+Estimated from HC derived.Chitty 1997

Additional Names

Short Name
GA from HC derived.Chitty 1997

Basic Attributes

Class
OB.US
Type
Clinical
First Released
Version 2.09
Last Updated
Version 2.70
Order vs. Observation
Observation

Formula (Readable)

Gestational age from Head Circumference: GA = Exp (0.010611*HC-0.00003032*HC2+0.43498*10-7*HC3+0.08024); SD: ± 0.0005263*HC + 0.000014204*HC2 + 0.08024; Derived output: 12-39 weeks; Published input: 80-320 mm

Member of these Groups Get Info

LOINC Group Group Name
LG50112-8 Gestational ageTime^Fetus

Language Variants Get Info

Tag Language Translation
es-AR Spanish (Argentina) US.ESTIMATED FROM HC DERIVED.CHITTY.97:tiempo:punto en el tiempo:^feto:cuantitativo:US.ESTIMATED FROM HC DERIVED.CHITTY.97
es-MX Spanish (Mexico) Edad gestacional:Tiempo:Punto temporal:^ Feto:Cuantitativo:US+Estimated from HC derived.Chitty 1997
fr-BE French (Belgium) Age gestationnel:Durée:Temps ponctuel:^Foetus:Quantitatif:US.estimé selon HC derived.Chitty 1997
it-IT Italian (Italy) Età gestazionale:Tempo:Pt:^feto:Qn:Ecografia.stimata da HC derivata.Chitty 1997
Synonyms: Eco Ecografia ostetrica Punto nel tempo (episodio) Tempo (e.g. secondi)
pt-BR Portuguese (Brazil) Idade gestacional:Tempo:Pt:^Feto:Qn:US.estimado pelo valor obtido da circunferência craniana.Chitty.97
Synonyms: ; GA; Point in time; Random; Fet; Fetal; Quantitative; QNT; Quant; Quan; 97; Head Circumference; US.est; predicted; Ultrasound; ULS; Sonogram; Sonography; Sonograph; Echography; Est; estimation; Gest; Gestation; Prenatal; OBSTERICAL.ULTRASOUND; OBSTERICAL.ULTRASOUND; Obstetrical; Obstetrics
zh-CN Chinese (China) 孕龄:时间:时间点:^胎儿:定量型:超声+依据导出型头围的估计法.Chitty.97
Synonyms: HC 产科 产科.超声;产科.超声.印象与测量指标;产科学.超声;产科学.超声.印象与测量指标;产科学检查与测量指标.超声.印象与测量指标;产科学超声印象与测量指标 产科学 受孕 受孕期 受孕期的 受孕的 可用数量表示的;定量性;数值型;数量型;连续数值型标尺 头围（Head Circumference，HC） 妊娠 妊娠期的 妊娠的 导出法;推导法;推论法;衍生法 怀卵 怀卵期 怀卵期的 怀卵的 怀孕 怀孕期 怀孕期的 怀孕的 时刻;随机;随意;瞬间 时间(如秒);时间(如秒数) 胎;超系统 - 胎儿 胎龄;Gestational Age;GA 胎龄估计法;孕龄估计法 超声.依据头围的胎龄估计法;超声.依据HC的胎龄估计法 超声.依据导出型头围的胎龄估计法.Chitty.97;超声.依据导出型头围的胎龄估计法.Chitty 1997;超声.依据导出型头围的胎龄估计法.Chitty97;超声.依据推导型头围的胎龄估计法.Chitty 1997;超声.依据推导型头围的胎龄估计法.Chitty.97;超声.依据推导型头围的胎龄估计法.Chitty97;超声.依据派生型头围的胎龄估计法.Chitty 1997;超声.依据派生型头围的胎龄估计法.Chitty.97;超声.依据派生型头围的胎龄估计法.Chitty97;超声.依据衍生型头 超声.胎龄估计法 超声检查方法;超声检查法;超声波;超声波检查方法;超声波检查法

Example Units

Unit Source
d Example UCUM Units

LOINC Terminology Service (API) using HL7® FHIR® Get Info

CodeSystem lookup
https://fhir.loinc.org/CodeSystem/$lookup?system=http://loinc.org&code=33111-6