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Human Reproduction, Vol. 15, No. 3, 616-620, March 2000
© 2000 European Society of Human Reproduction and Embryology

Embryo transfer under ultrasound guidance improves pregnancy rates after in-vitro fertilization

B. Coroleu1, O. Carreras, A. Veiga, A. Martell, F. Martinez, I. Belil, L. Hereter and P.N. Barri

Service of Reproductive Medicine, Department of Obstetrics and Gynaecology, Institut Universitari Dexeus, Pso. Bonanova 67, 08017 Barcelona, Spain

Between October 1998 and January 1999, we examined the influence of ultrasound guidance in embryo transfer on pregnancy rate in 362 patients from our in-vitro fertilization (IVF)–embryo transfer programme. These patients were prospectively randomized into two groups: 182 had ultrasound-guided embryo replacement, and 180 had clinical touch embryo transfer. There were no statistically significant differences between the two groups with respect to age, cause of infertility and in the characteristics of the IVF cycle. The pregnancy rate was significantly higher among the ultrasound-guided embryo transfer group (50%) compared with the clinical touch group (33.7%) (P < 0.002). Furthermore, there was also a significant increase in the implantation rate: 25.3% in the ultrasound group compared with 18.1% in the clinical touch group (P < 0.05). In conclusion, ultrasound assistance in embryo transfer significantly improved pregnancy and implantation rates in IVF.

Key words: clinical touch/implantation rate/IVF/pregnancy rate/ultrasound-guided embryo transfer

1 To whom correspondence should be addressed


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