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Updated: Aug 15, 2026
14:19
Fetal Echocardiography and Pulsed-wave Doppler Ultrasound in a Rabbit Model of Intrauterine Growth Restriction
Published on: June 29, 2013
Summary
New fetal growth standards exclude non-survivors and account for early pregnancy bleeding, improving accuracy. These revised standards offer more precise measurements for premature neonates, reducing variability.
Area of Science:
- Perinatology
- Neonatal research
- Biostatistics
Background:
- Existing fetal growth standards include data from neonates who did not survive.
- These non-survivors are often growth-retarded, potentially skewing standard measurements.
- Maternal bleeding in early pregnancy can be misidentified as the last menstrual period, affecting gestational age assessment.
Purpose of the Study:
- To develop improved fetal growth standards using data exclusively from surviving infants.
- To address and correct for errors in gestational age determination caused by misidentified maternal bleeding.
- To create more accurate and reliable fetal growth references.
Main Methods:
- Analysis of existing fetal growth standards to identify errors.
- Development of new standards using data solely from surviving neonates.
- Application of the probability plot method to differentiate measurement clusters based on gestational age, correcting for misidentified maternal bleeding.
Main Results:
- New fetal growth standards were created using measurements from survivors only.
- The probability plot method successfully separated measurement clusters, identifying and excluding data influenced by misidentified early pregnancy bleeding.
- The new standards exhibit significantly smaller standard deviations around mean values compared to older standards.
Conclusions:
- Revised fetal growth standards based on survivors provide a more accurate representation of typical fetal development.
- Correcting for misidentified last menstrual periods through probability plotting enhances gestational age accuracy.
- The reduced variability in the new standards offers a more precise tool for clinical assessment of fetal growth.
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