Intracytoplasmic sperm injection today: a personal review

Area of Science:

• Reproductive Medicine
• Andrology
• Infertility Treatment

Background:

• Male factor infertility encompasses a wide range of conditions, including azoospermia due to obstruction or germinal failure.
• Previous treatment options were limited for severe cases of male infertility.

Purpose of the Study:

• To evaluate the efficacy of intracytoplasmic sperm injection (ICSI) across all categories of male factor infertility.
• To identify factors influencing ICSI success rates in couples with severe male infertility or azoospermia.
• To assess the safety and risks associated with ICSI pregnancies.

Main Methods:

• Analysis of ICSI success rates in men with various causes of infertility, including azoospermia.
• Evaluation of sperm source (epididymal, testicular, ejaculated) and sperm defects.
• Review of genetic and pediatric follow-up data from ICSI pregnancies.

Main Results:

• ICSI is highly effective for most male infertility cases, including azoospermia where sperm retrieval is possible.
• Sperm source and specific causes of sperm defects (e.g., maturation arrest, Sertoli cell-only) do not significantly impact pregnancy rates.
• Female partner's age and ovarian reserve are the primary factors influencing success; congenital malformation and chromosomal abnormality risks are low.

Conclusions:

• Intracytoplasmic sperm injection (ICSI) offers a viable treatment for nearly all forms of male factor infertility.
• Successful sperm retrieval and the female partner's reproductive status are key determinants of ICSI outcomes.
• ICSI pregnancies demonstrate reassuring safety profiles, though genetic counseling is essential for affected couples.