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© 2009 by the American Institute of Ultrasound in Medicine
J Ultrasound Med 28:573-578 • 0278-4297

Advantages of 3-Dimensional Sonography in Embryo Transfer

Lanlan Fang, MD, Yingpu Sun, PhD, Yingchun Su, MD and Yihong Guo, PhD

Center for Reproductive Medicine, Department of Obstetrics and Gynecology, First Affiliated Hospital of Zhengzhou University, Zhengzhou, China.

Address correspondence to Yingpu Sun, PhD, Center for Reproductive Medicine, First Affiliated Hospital of Zhengzhou University, 40 Daxue Rd, 450052 Zhengzhou, Henan, China., E-mail: syp2008{at}vip.sina.com

Objective. The purpose of this study was to investigate the advantages of 3-dimensional (3D) sonography in embryo transfer. Methods. With the use of 2-dimensional (2D) and 3D sonography to measure the transfer distance from the fundus (TDF), 319 patients were allocated into 4 groups according to the disparity between 2D and 3D images: group 1 showed disparity of less than 3 mm; group 2 showed disparity of 3 to 5 mm; group 3 showed disparity of 6 to 9 mm; and group 4 showed disparity of 10 mm or greater. The general characteristics and pregnancy outcomes were compared among the 4 groups. Results. For 140 patients, the TDF measured by 2D sonography was different from that measured by 3D sonography, with a positive to negative range of 3 to 13 mm. Compared with the first 3 groups, the clinical pregnancy and implantation rates were lowest in group 4 (7.7% versus 34.1%, 38.1%, and 40%; 3.6% versus 18.2%, 21.2%, and 22.2%; P < .05). Conclusions. Compared with 2D sonography, uterine cavity and catheter placement may be better achieved with 3D sonography, which would improve the embryo transfer technique.

Key Words: embryo transfer • 3-dimensional sonography • transfer distance from the fundus

Abbreviations: CPR, clinical pregnancy rate • ET, embryo transfer • ICSI, intracytoplasmic sperm injection • IR, implantation rate • IVF, in vitro fertilization • TDF, transfer distance from the fundus • 3D, 3-dimensional • 2D, 2-dimensional

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Copyright © 2009 by the American Institute of Ultrasound in Medicine.