Umbilical artery waveforms in triplet pregnancy.

Area of Science:

• Perinatology
• Fetal Medicine
• Diagnostic Ultrasound

Background:

• Triplet pregnancies carry increased risks for adverse fetal outcomes.
• Monitoring fetal well-being in multiple gestations is crucial.
• Umbilical artery Doppler velocimetry is a non-invasive tool for assessing placental function.

Purpose of the Study:

• To evaluate the utility of continuous-wave Doppler ultrasound of umbilical artery waveforms in triplet pregnancies.
• To determine if Doppler findings correlate with fetal growth and survival.
• To assess the potential of Doppler studies in guiding fetal surveillance strategies.

Main Methods:

• Continuous-wave Doppler ultrasound of umbilical artery waveforms was performed in 20 patients with triplet pregnancies.
• Umbilical artery velocity waveforms were analyzed as part of a multiple pregnancy surveillance program.
• Correlation between waveform abnormalities and infant growth (small for gestational age) and survival was examined.

Main Results:

• Nine of 20 triplet pregnancies had at least one infant small for gestational age.
• All pregnancies with small for gestational age infants exhibited at least one abnormal umbilical artery waveform.
• Two stillbirths occurred, both preceded by consistently abnormal umbilical artery waveforms (absent diastolic flow).

Conclusions:

• Umbilical artery Doppler waveform studies are valuable in identifying high-risk fetuses in triplet pregnancies.
• Abnormal Doppler findings are associated with small for gestational age infants and stillbirth.
• Doppler velocimetry can help delineate triplet pregnancies requiring more intensive fetal surveillance.