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Artificial oocyte activation and intracytoplasmic sperm injection.
Mohammad Hossein Nasr-Esfahani1, Mohammad Reza Deemeh, Marziyeh Tavalaee
1Isfahan Fertility and Infertility Center, Isfahan, Iran. mh_nasr@med.mui.ac.ir
Fertility and Sterility
|April 28, 2009
Summary
Artificial oocyte activation (AOA) can improve fertilization rates in intracytoplasmic sperm injection (ICSI) cycles, especially for patients with low fertilization potential. Further research is needed to ensure AOA safety and optimize patient selection.
Area of Science:
- Reproductive Medicine
- In Vitro Fertilization
- Embryology
Background:
- Intracytoplasmic sperm injection (ICSI) enhances fertilization rates in male factor infertility.
- Fertilization failure persists in 2-3% of ICSI cycles, primarily due to incomplete oocyte activation.
- Oocyte activation failure is a critical barrier to successful fertilization.
Purpose of the Study:
- To review methods for artificial oocyte activation (AOA).
- To assess the impact of AOA on intracytoplasmic sperm injection (ICSI) outcomes.
- To identify potential applications and limitations of AOA in assisted reproduction.
Main Methods:
- Comprehensive literature review of artificial oocyte activation techniques.
- Analysis of mechanical, electrical, and chemical methods for oocyte activation.
- Evaluation of existing data on fertilization rates following AOA.
Main Results:
- Various methods exist to induce artificial oocyte activation, mimicking the natural calcium rise.
- Chemical activation is a prevalent technique, demonstrating high fertilization rates.
- Failure of oocyte activation is the primary cause of fertilization failure in ICSI.
Conclusions:
- Artificial oocyte activation (AOA) shows promise for selected patients with diminished fertilization potential.
- Further studies are essential to establish the biosafety of AOA procedures.
- Clinical evaluation of semen samples is needed for effective patient selection in AOA.
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