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The IMSI procedure improves poor embryo development in the same infertile couples with poor semen quality: a
Katja Knez1, Branko Zorn, Tomaz Tomazevic
1Department of Obstetrics and Gynaecology, University Medical Centre Ljubljana, Ljubljana, Slovenia. knez.katja@gmail.com
Reproductive Biology and Endocrinology : RB&E
|August 31, 2011
Summary
Intracytoplasmic morphologically selected sperm injection (IMSI) improved embryo development and pregnancy outcomes in couples with male infertility and previous ICSI failures. This technique offers better results than conventional intracytoplasmic sperm injection (ICSI) for male infertility.
Area of Science:
- Reproductive Medicine
- Embryology
- Infertility Treatment
Background:
- Poor sperm quality significantly impacts embryo development to the blastocyst stage.
- Previous intracytoplasmic sperm injection (ICSI) cycles in couples with male infertility resulted in arrested embryos after 5-day culture.
Purpose of the Study:
- To evaluate the efficacy of intracytoplasmic morphologically selected sperm injection (IMSI) compared to conventional ICSI.
- To assess IMSI's role in improving outcomes for couples with male infertility and prior embryo development issues.
Main Methods:
- A prospective randomized study comparing IMSI (n=20) with conventional ICSI (n=37) in infertile couples.
- Outcomes analyzed included fertilization, embryo development, implantation, pregnancy, and abortion rates.
Main Results:
- The IMSI group showed a higher blastocyst rate (0.80 vs. 0.65) and fewer cycles with arrested embryos (0% vs. 27.0%).
- IMSI demonstrated a trend towards higher implantation (17.1% vs. 6.8%) and pregnancy rates (25.0% vs. 8.1%).
- All IMSI blastocyst transfer pregnancies were ongoing, contrasting with ICSI where 2/3 ended in spontaneous abortion.
Conclusions:
- IMSI significantly improved embryo development and laboratory outcomes in male infertility cases.
- The procedure enhanced clinical results, including pregnancy and ongoing pregnancy rates, compared to previous ICSI attempts.
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