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© 2007 by the American Institute of Ultrasound in Medicine
J Ultrasound Med 26:931-939 • 0278-4297

Comparison of 2-Dimensional, 3-Dimensional, and Vascular Ultrasonographic Parameters for Endometrial Receptivity Between 2 Consecutive Stimulated In Vitro Fertilization Cycles

Ernest Hung Yu Ng, MD, Carina Chi Wai Chan, MBBS, Oi Shan Tang, MD and Pak Chung Ho, MD

Department of Obstetrics and Gynecology, The University of Hong Kong, Hong Kong.

Address correspondence to Ernest Hung Yu Ng, MD, Department of Obstetrics and Gynecology, The University of Hong Kong, 6/F, Professorial Block, Queen Mary Hospital, Pokfulam Road, Hong Kong. E-mail: nghye{at}hkucc.hku.hk

Objective. We compared the ultrasonographic parameters for endometrial receptivity between 2 consecutive in vitro fertilization (IVF) cycles in the same patients. Methods. Patients who had undergone 2 in vitro fertilization cycles between November 2002 and December 2004 were recruited. A 3-dimensional ultrasonographic examination with power Doppler imaging was performed on the day of oocyte retrieval to determine the endometrial thickness, endometrial pattern, pulsatility and resistive indices of uterine vessels, endometrial volume, vascularization index, flow index, and vascularization flow index of endometrial and subendometrial regions. Results. Of 662 patients, 95 (14.4%) underwent 2 consecutive cycles using the same stimulation regimen during the study period. There were no significant differences in these ultrasonographic parameters between the first and second cycles. The intraclass correlation coefficient (ICC) for endometrial volume was significantly higher than that of other ultrasonographic parameters. The ICC for the endometrial thickness, uterine pulsatility index, and endometrial 3-dimensional power Doppler flow indices were similar. Conclusions. Ultrasonographic parameters for endometrial receptivity were comparable in the 2 consecutive stimulated cycles. The endometrial volume had the highest ICC among these ultrasonographic parameters and was most reproducible between 2 cycles.

Key Words: endometrial receptivity • 3-dimensional power Doppler ultrasonography • ultrasonographic parameters

Abbreviations: CI, confidence interval • E2, estradiol • FI, flow index • FSH, follicle-stimulating hormone • hCG, human chorionic gonadotropin • hMG, human menopausal gonadotropin • ICC, intraclass correlation coefficient • IVF, in vitro fertilization • PI, pulsatility index • RI, resistive index • 3D, 3-dimensional • TUGOR, transvaginal ultrasonographically guided oocyte retrieval • VFI, vascularization flow index • VI, vascularization index • VOCAL, Virtual Organ Computer-Aided Analysis

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Copyright © 2007 by the American Institute of Ultrasound in Medicine.