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July 2020 Vol. 8 No.7

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Ray-offor OD
Ngene PC

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Merit Research Journal of Medicine and Medical Sciences (ISSN: 2354-323X) Vol. 8(7) pp. 347-350, July, 2020 

Copyright © 2020 Author(s) retain the copyright of this article
DOI: 10.5281/zenodo.3969346

Original Research Article

Normal Umbilical Artery Doppler Assessment in Second and Third Trimester Singleton Gestation of Healthy Pregnant Women in Port Harcourt, Nigeria


Ray-Offor* OD and Ngene PC


Oak Endoscopy Centre, Precision Imaging Consultants Port- Harcourt, Rivers state Nigeria.

*Corresponding Author's E-mail: orayoffor@yahoo.com

Received: 08 July 2020  I  Accepted: 26 July 2020  I  Published: 31 July 2020  I  Article ID: MRJMMS-20-108
Copyright © 2020 Author(s) retain the copyright of this article.
This article is published under the terms of the Creative Commons Attribution License 4.0.




Umbilical artery Doppler assessment is an important marker of uteroplacental insufficiency and consequent intrauterine growth restriction therefore assessment of normal values is key in early detection of these anomalies. This cohort study was carried out on 222 pregnant Nigerian women in a private hospital in Port Harcourt Nigeria. Duplex color Doppler sonography was utilized in measurement of Pulsatility Index (PI), Resistivity index (PI) and systolic/diastolic (S/D) ratio of the umbilical artery of fetuses during the 2nd and 3rd trimesters. The age range was from 20-45 years with a mean age of 28.3 ± 1.8. The mean values and standard deviations (SD) of the PI and RI value of the umbilical artery in the 2nd and 3rd trimester were 1.05 (SD ± 0.24) and 0.63 (SD ± 0.10) respectively. In separate trimesters the mean value of PI in the 2nd trimester was 1.10 (SD ± 0.25), RI 0.6 (SD ± 0.12) and in the 3rd trimester PI 0.98 (SD ± 0.23), RI 0.5 (SD ± 0.07). There was significant difference between mean values of PI in different gestational ages (t=3.76, level of significance=0.000), PI value decreased with increasing gestational age (r=-0.027) but not statistically significant (p=0.112). Normal reference values of the umbilical artery doppler velocimetry in our environment has been documented and shows a normal variation of umbilical artery velocimetry in 2nd and 3rd trimester gestation with advancing gestational age.

Keywords: Doppler ultrasound, normal gestation, Umbilical artery











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