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Obstet Gynecol Sci > Volume 55(7); 2012 > Article
Korean Journal of Obstetrics & Gynecology 2012;55(7):454-460.
DOI: https://doi.org/10.5468/KJOG.2012.55.7.454    Published online July 13, 2012.
A longitudinal study of three-dimensional ultrasonographic assessment of the placenta in uncomplicated pregnancies.
Nan Hee Jeong, Ki Yeol Yang, Hyun Joo Seol, Eui Jung
Department of Obstetrics and Gynecology, Kyung Hee University School of Medicine, Seoul, Korea. eui2536@hanmail.net
The purpose of our study was to investigate the relationship between birth weight and 3-dimensional (3D) power Doppler histogram of the placenta in the first- and second-trimester of uncomplicated pregnancies. METHODS: In this longitudinal study, 3D power Doppler ultrasound was performed in 54 non-smoking women with uncomplicated pregnancies at 10 to 13 weeks of gestation and subsequently at 19 to 22 weeks. A correlation and regression analysis was performed for placental volume (PV) and vascular indices versus clinical and sonographic variables. RESULTS: All vascular indices of the second-trimester were significantly greater than values of the first-trimester. Placental vascular indices showed an incremental tendency with birth weight, which was only statistically significant when the flow index (FI) of the first-trimester was considered (P=0.02). The PV of both the first- and second-trimester has a negative correlation with FI of the second-trimester. CONCLUSION: Our findings suggest that FI of the placenta in the first-trimester significantly affects growth of the fetus and placenta, likely reflecting the degree of placental vascularization during the first-trimester.
Key Words: Three-dimensional power Doppler ultrasound, Uncomplicated pregnancy, Placental vascularization

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