Fetal Measurements
Fetal Measurements - Related Videos
08:04
Murine Fetal Echocardiography
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Cited by 7 •
2013
Fetal and perinatal death is a common feature when studying genetic alterations affecting cardiac development. High-frequency ultrasound imaging has improved 2-D resolution and can provide excellent information on early cardiac development and is an ideal method to detect the impact on cardiac structure and function prior to death.
06:58
Culturing and Measuring Fetal and Newborn Murine Long Bones
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Cited by 4 •
2019
Here, we present a method for ex vivo culture of long murine bones at both fetal and newborn stages, suitable for analyzing bone and cartilage development and homeostasis in controlled conditions while recapitulating the in vivo process.
14:19
Fetal Echocardiography and Pulsed-wave Doppler Ultrasound in a Rabbit Model of Intrauterine Growth Restriction
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Cited by 11 •
2013
We describe examination of fetal cardiac function with contemporary functional fetal echocardiography and fetoplacental Doppler ultrasound using the VisualSonics VEVO 2100 microultrasound in a surgically induced model of intrauterine fetal growth restriction in a rabbit.
05:40
Continuous Telemetric In Utero Tracheal Pressure Measurements in Fetal Lambs
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2023
Optimization of occlusion pressure and duration required to improve lung hypoplasia with tracheal occlusion is essential to improve in utero corrective treatments for congenital diaphragmatic hernia (CDH). This study reports a new method for continuous measurement of the tracheal pressure in an occluded and unoccluded fetal lamb surgical model of CDH.
06:31
Transuterine Fetal Tracheal Occlusion Model in Mice
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Cited by 2 •
2021
Various animal models of congenital diaphragmatic hernia and fetal tracheal occlusion present advantages and disadvantages regarding ethical issues, cost, surgical difficulty, size, survival rates, and availability of genetic tools. This model provides a new tool to study the impact of both tracheal occlusion and increased luminal pressure on lung development.
FAQs
Reference standards provide the comparison framework for deciding whether a measured value is consistent with the expected gestational age. The same fetal size may have different significance at different points in pregnancy, so clinicians interpret each result against the appropriate age-based standard rather than treating the number as meaningful in isolation. This supports more consistent assessment of fetal growth.
A set of measurements provides a broader view of fetal size and development than any single structure can provide. Crown-rump length, head dimensions, abdominal circumference, and femur length may contribute different information to the overall growth pattern. Considering them together helps clinicians recognize whether findings are generally consistent or suggest a pattern requiring closer evaluation.
Interpretation depends on gestational age, measurement technique, and the surrounding clinical context. A result may therefore require caution when considered without accurate dating or standardized acquisition. Clinicians use these factors to judge how much confidence to place in a measurement and whether the finding should prompt additional assessment rather than an immediate conclusion about fetal well-being.
During an ultrasound examination, the clinician obtains measurements of selected fetal structures, including the crown-rump length, biparietal diameter, head circumference, abdominal circumference, and femur length. The recorded values are then compared with gestational-age reference standards. Interpretation considers the combined pattern, technical quality, and clinical context to support assessment of size and development.
Repeating measurements over time allows clinicians to assess growth patterns rather than reviewing a single examination alone. Changes in the measured values can help show whether fetal growth remains consistent with expectations or whether a pattern warrants further evaluation. This longitudinal information can contribute to decisions about ongoing monitoring and care in pregnancy.
Fetal measurements can support evaluation when clinicians suspect fetal growth restriction or excessive growth. They also contribute to prenatal dating and assessment of development when interpreted with gestational-age standards. These findings do not stand alone; their usefulness comes from combining quantitative results with measurement technique and clinical context to guide further evaluation and care.