Intrauterine growth retardation

Area of Science:

• Obstetrics and Gynecology
• Fetal Medicine
• Diagnostic Imaging

Background:

• Diagnosing intrauterine growth restriction (IUGR) presents significant challenges, particularly differentiating dysmature infants from constitutionally small ones.
• Accurate gestational age assessment is crucial for antenatal detection of IUGR.

Purpose of the Study:

• To outline strategies for the antenatal diagnosis and management of IUGR.
• To improve the identification of fetuses at high risk for growth retardation.

Main Methods:

• Routine early ultrasound for biparietal diameter (BPD) to establish gestational age.
• Serial symphysis-fundal height (SFH) measurements and third-trimester ultrasounds for screening.
• Detailed serial growth parameter measurements and H/A ratio charts for classifying IUGR.
• Pulsed Doppler ultrasound for flow velocity waveform analysis.

Main Results:

• Early ultrasound for BPD is essential for accurate gestational age determination.
• Clinical methods combined with SFH or repeat ultrasound can detect approximately 85% of IUGR cases.
• The H/A ratio chart aids in differentiating asymmetric and symmetric IUGR for tailored management.
• Doppler ultrasound shows potential for future rationalization of antenatal fetal monitoring referrals.

Conclusions:

• Accurate gestational age determination via early ultrasound is fundamental for IUGR diagnosis.
• A combination of clinical and ultrasound methods enhances the detection of growth-restricted fetuses.
• Antenatal classification of IUGR subtypes guides appropriate investigation and management strategies.
• Doppler ultrasound may refine future antenatal surveillance protocols for high-risk pregnancies.