open access

Vol 91, No 11 (2020)
Research paper
Published online: 2020-10-01
Get Citation

The crown-rump length measurement — ISUOG criteria and clinical practice

Dominik Jakubowski, Daria Salloum, Andrzej Torbe, Sebastian Kwiatkowski, Magdalena Bednarek-Jedrzejek
DOI: 10.5603/GP.a2020.0098
·
Pubmed: 33301161
·
Ginekol Pol 2020;91(11):674-678.

open access

Vol 91, No 11 (2020)
ORIGINAL PAPERS Obstetrics
Published online: 2020-10-01

Abstract

Objectives: Significance of the crown-rump length (CRL) measurement criteria in the assessments of gestational age and
actual precision in daily clinical practice.
Material and methods: We recruited 806 pregnant women with singleton pregnancy and history of regular menstrual
periods.We analysed retrospectively CRL measurements obtained during routine first trimester scan performed between
11 + 0 and 13 + 6 weeks gestation. Gestational age was calculated using both the last menstrual period (LMP) and the CRL.
The images of the CRL measurements were assessed by the expert. The visual analysis of the images in terms of meeting the
five criteria recommended by the International Society of Ultrasound in Obstetrics and Gynecology (ISUOG) was performed.
Statistical analysis were used to assess how the above-mentioned criteria influenced calculation of the gestational age.
Results: The study showed 323 out of 806 of the CRL measurements (40.1%) were qualified by a specialist as accurate,
279 (34.6%) as inaccurate, and 204 (25.3%) as inaccurate, but not changing the duration of a pregnancy. With the application
in the assessment of the five criteria of the ISOUG 217 (26.9%), the following results of qualification were obtained: accurate
— fulfilled ≥ 4, inaccurate 341 (42.3%) — fulfilled ≤ 2, whereas inaccurate, but not changing the duration of a pregnancy
248 (30.8%) — 3 criteria fulfilled. We found that only the neutralof the fetus demonstrated a significant corellation with
the assessment of the duration of a gestation.
Conclusions: a) the accurate audit of the CRL measurements is recommended; b) neutral position of the fetus is the most
important criterion out of 5.

Abstract

Objectives: Significance of the crown-rump length (CRL) measurement criteria in the assessments of gestational age and
actual precision in daily clinical practice.
Material and methods: We recruited 806 pregnant women with singleton pregnancy and history of regular menstrual
periods.We analysed retrospectively CRL measurements obtained during routine first trimester scan performed between
11 + 0 and 13 + 6 weeks gestation. Gestational age was calculated using both the last menstrual period (LMP) and the CRL.
The images of the CRL measurements were assessed by the expert. The visual analysis of the images in terms of meeting the
five criteria recommended by the International Society of Ultrasound in Obstetrics and Gynecology (ISUOG) was performed.
Statistical analysis were used to assess how the above-mentioned criteria influenced calculation of the gestational age.
Results: The study showed 323 out of 806 of the CRL measurements (40.1%) were qualified by a specialist as accurate,
279 (34.6%) as inaccurate, and 204 (25.3%) as inaccurate, but not changing the duration of a pregnancy. With the application
in the assessment of the five criteria of the ISOUG 217 (26.9%), the following results of qualification were obtained: accurate
— fulfilled ≥ 4, inaccurate 341 (42.3%) — fulfilled ≤ 2, whereas inaccurate, but not changing the duration of a pregnancy
248 (30.8%) — 3 criteria fulfilled. We found that only the neutralof the fetus demonstrated a significant corellation with
the assessment of the duration of a gestation.
Conclusions: a) the accurate audit of the CRL measurements is recommended; b) neutral position of the fetus is the most
important criterion out of 5.

Get Citation

Keywords

CRL, gestation, early pregnancy

About this article
Title

The crown-rump length measurement — ISUOG criteria and clinical practice

Journal

Ginekologia Polska

Issue

Vol 91, No 11 (2020)

Article type

Research paper

Pages

674-678

Published online

2020-10-01

DOI

10.5603/GP.a2020.0098

Pubmed

33301161

Bibliographic record

Ginekol Pol 2020;91(11):674-678.

Keywords

CRL
gestation
early pregnancy

Authors

Dominik Jakubowski
Daria Salloum
Andrzej Torbe
Sebastian Kwiatkowski
Magdalena Bednarek-Jedrzejek

References (14)
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