Doppler umbilical artery studies in the twin- twin transfusion syndrome

Warwick B. Giles*, Brian J. Trudinger, Colleen M. Cook, Anita J. Connelly

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

34 Citations (Scopus)


Eleven patients with twin pregnancies were identified as having twin-twin transfusion syndrome on the basis of like-sex twins with monochorionic placentation and umbilical venous blood hemoglobin differences exceeding 50 g/L at delivery. Umbilical artery velocity-time waveform studies had been performed in these pregnancies as part of a large series of 456 twin pregnancies. In all 11 cases, the systolic- diastolic (S-D) ratio differences between the twins were less than 1 unit (mean 0.4 ± 0.2), indicating that in twin-twin transfusion, umbilical artery S-D ratios are concordant even in the presence of discordancy in fetal size.

Original languageEnglish
Pages (from-to)1097-1099
Number of pages3
JournalObstetrics and Gynecology
Issue number6
Publication statusPublished - 1 Dec 1990
Externally publishedYes


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