11913-1

Gestational age estimated from Crown rump length on US by Nelson 1981 method

Active

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

LOINC Names Get Info

Fully-Specified Name: Gestational age:Time:Pt:^Fetus:Qn:US+Estimated from CRL.Nelson 1981
Long Common Name: Gestational age estimated from Crown rump length on US by Nelson 1981 method
Short Name: GA from CRL.Nelson81

Part Model Get Info

Component
Gestational age
LP19507-0
- Analyte
  Gestational age
  LP19507-0
  - Component Numerator
    Gestational age
    LP19507-0
    - Component Numerator Core
      Gestational age
      LP19507-0
    - Component Numerator Core Suffix
      NULL
  - Component Denominator
    NULL
    - Component Denominator Core
      NULL
    - Component Denominator Core Suffix
      NULL
- Challenge
  NULL
- Adjustment
  NULL
- Count
  NULL
Property
Time
LP6879-3
Time
Pt
LP6960-1
- Time Core
  Pt
  LP6960-1
- Time Modifier
  NULL
System
^Fetus
LP310004-9
- System Core
  NULL
- Super System
  Fetus
  LP6982-5
Scale
Qn
LP7753-9
Method
US+Estimated from CRL.Nelson 1981
LP6696-1

Basic Attributes

Class: OB.US
Type: Clinical
First Released: Version 1.0j-a
Last Updated: Version 2.52 (MIN)
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
el-GR	Greek (Greece)	Ηλικία κύησης:Time:Pt:^Έμβρυο:Qn:Υπερηχογράφημα+Εκτιμώμενο βάσει κεφαλουραίου μήκους.Nelson 1981 Synonyms: - OB.US Pt Qn Time Εκτιμώμενο Έμβρυο Ηλικία Ηλικία κύησης ΗΠΑ Υπερηχογράφημα+Εκτιμώμενο Υπερηχογράφημα+Εκτιμώμενο βάσει κεφαλουραίου μήκους Υπερηχογράφημα+Εκτιμώμενο βάσει κεφαλουραίου μήκους.Nelson 1981
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

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Copyright © Regenstrief Institute, Inc. All Rights Reserved. To the extent included herein, the LOINC table and LOINC codes are copyright © Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee. See https://loinc.org/license for the full LOINC copyright and license.