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Correlation between umbilical resistance index and fetal growth: Pilot study
Mehdi Kehila1, Omar Touhami1, Rim Ben Hmid1
1C Department of Obstetrics and Gynecology, Tunis Maternity Center, Tunis El Manar University, Tunisia.
The Journal of Obstetrics and Gynaecology Research
|February 3, 2017
Summary
In normal pregnancies, higher umbilical resistance index (RI) is linked to slower fetal growth. This study found an inverse linear relationship between umbilical artery RI and fetal weight gain during the third trimester.
Area of Science:
- Perinatology
- Fetal Medicine
- Obstetrics
Background:
- Umbilical artery resistance index (RI) is a non-invasive ultrasound marker.
- Assessing fetal growth is crucial for monitoring pregnancy well-being.
- Understanding factors influencing fetal growth is essential for optimal obstetric care.
Purpose of the Study:
- To determine the relationship between umbilical artery resistance index (RI) and fetal growth in normal pregnancies.
- To investigate if umbilical resistance impacts third-trimester fetal weight gain.
Main Methods:
- Prospective study in three academic departments.
- Third-trimester prenatal ultrasonography to estimate fetal weight and measure umbilical artery RI.
- Post-delivery birthweight recorded to calculate weekly weight gain.
Main Results:
- Mean umbilical artery RI was 0.62 ± 0.07.
- Mean weekly fetal weight gain was 186.4 ± 63.9 g.
- An inverse linear relationship was observed: higher RI correlated with lower fetal weight gain per week.
Conclusions:
- A linear relationship exists between umbilical artery RI (measured at 31-34 weeks) and third-trimester fetal growth in normal pregnancies.
- Increased umbilical resistance index is associated with reduced fetal weight gain.
- Umbilical artery RI may serve as an indicator of fetal growth potential during late gestation.
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