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 Nelson LH. Comparison of methods for determining crown-rump measurement by real-time ultrasound. J Clin Ultrasound 1981;9(2):67-70. Link to PubMed

Fully-Specified Name

Component
Gestational age
Property
Time
Time
Pt
System
^Fetus
Scale
Qn
Method
US+Estimated from CRL.Nelson 1981

Additional Names

Short Name
GA from CRL.Nelson81

Basic Attributes

Class
OB.US
Type
Clinical
First Released
Version 1.0j-a
Last Updated
Version 2.52
Order vs. Observation
Observation

Formula (Readable)

GESTATIONAL AGE [days] = 51 + 0.6 * (crown-rump length [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 CRL.NELSON.81:tiempo:punto en el tiempo:^feto:cuantitativo:US.ESTIMATED FROM CRL.NELSON.81
es-MX Spanish (Mexico) Edad gestacional:Tiempo:Punto temporal:^ Feto:Cuantitativo:US+Estimated from CRL.Nelson 1981
fr-BE French (Belgium) Age gestationnel:Durée:Temps ponctuel:^Foetus:Quantitatif:US.estimé sur CRL .Nelson 1981
it-IT Italian (Italy) Età gestazionale:Tempo:Pt:^feto:Qn:Ecografia.stimata da CRL.Nelson 1981
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 comprimento cAceça-nádega.Nelson.81
Synonyms: ; GA; Point in time; Random; Fet; Fetal; Quantitative; QNT; Quant; Quan; from CRL.Nelson81; 81; CRL chart; from CRL.Nelson81; Crown-Rump Length; 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+依据顶臀长的估计法.Nelson.81
Synonyms: 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 冠臀长 冠臀长度 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 坐高 妊娠 妊娠期的 妊娠的 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 胚胎学中反映胎儿身体状况的标准之一，用于测量第4周及以后的胚胎。一般从胎儿头部顶端量至臀部最低处,采用超声法测量。 超声.依据顶臀长的胎龄估计法.Nelson.81;超声.依据顶臀长的胎龄估计法.Nelson 1981;超声.依据顶臀长的胎龄估计法.Nelson81 超声.依据顶臀长的胎龄估计法;超声.依据CRL的胎龄估计法;超声.依据冠臀长的胎龄估计法;超声.依据头臀长的胎龄估计法 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 顶臀长 顶臀长（Crown-Rump Length，CRL） 顶臀长度

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=11913-1