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Ultrasound-guided embryo transfer: a prospective randomized controlled trial
1Department of Obstetrics and Gynaecology, The University of Hong Kong, Queen Mary Hospital, Hong Kong SAR, China. ostang@graduate.hku.hk
Human Reproduction (Oxford, England)
|October 27, 2001
Summary
Ultrasound guidance during embryo transfer showed a significant improvement in implantation rates. While overall pregnancy rates did not significantly differ, this technique may enhance fertility outcomes.
Area of Science:
- Reproductive Medicine
- Infertility Treatments
- Assisted Reproductive Technology
Background:
- Emerging evidence suggests ultrasound guidance may enhance pregnancy rates during embryo transfer.
- The clinical touch method is a traditional approach for embryo transfer.
Purpose of the Study:
- To compare the efficacy of ultrasound-guided embryo transfer versus the clinical touch method.
- To evaluate the impact of ultrasound guidance on pregnancy and implantation rates.
Main Methods:
- A prospective randomized controlled trial involving 800 embryo transfers.
- Participants were randomized to either ultrasound-guided transfer (400) or clinical touch (400).
- Study included both fresh and frozen-thawed embryo transfer cycles.
Main Results:
- The implantation rate was significantly higher in the ultrasound-guided group (15.3%) compared to the clinical touch group (12.0%) (P=0.048).
- Clinical pregnancy rates (26.0% vs 22.5%) and ongoing pregnancy rates (23.5% vs 19.0%) were not statistically different between groups.
- No significant differences were observed in ectopic pregnancy, miscarriage, or multiple pregnancy rates.
Conclusions:
- Ultrasound guidance during embryo transfer significantly improved implantation rates.
- The overall impact on pregnancy rates may vary based on center-specific techniques.