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Application of ICSI for cryptorchid therapy
I Sasagawa1, T Nakada, R Yanagimachi
1Department of Urology, Yamagata University School of Medicine, Japan. isasaga@med.id.yamagata-u.ac.jp
Archives of Andrology
|October 12, 2000
Summary
Assisted reproductive technology, including ICSI, offers hope for infertile patients with prior cryptorchidism. However, using round spermatids carries risks of genetic abnormalities in offspring, necessitating cautious clinical application.
Area of Science:
- Reproductive Medicine
- Genetics
- Assisted Reproductive Technology (ART)
Background:
- Cryptorchidism, the failure of testes to descend, often leads to impaired fertility.
- Previous treatments for cryptorchidism-related infertility had limited success.
- Advances in ART now offer new possibilities for conception.
Purpose of the Study:
- To review recent advances in ART for treating infertility in patients with a history of cryptorchidism.
- To evaluate the potential of using round spermatids as an alternative to mature sperm.
- To highlight the associated risks of genetic abnormalities in offspring.
Main Methods:
- Review of current literature on ART and ICSI for cryptorchidism.
- Analysis of fertility rates in patients with unilateral and bilateral cryptorchidism.
- Examination of studies using round spermatids and other germ cells in ART.
Main Results:
- Successful pregnancies and live births achieved using round spermatid injection in humans.
- Animal models demonstrate round spermatids can initiate normal embryo development.
- Fertility rates vary significantly based on unilateral (25-81%) vs. bilateral (8-48%) cryptorchidism.
Conclusions:
- Round spermatids show promise as substitutes for mature sperm in ART for cryptorchidism patients.
- Cryptorchidism is frequently linked to intrinsic spermatogenesis defects, increasing genetic risks.
- Clinicians must exercise caution with ART to prevent genetic abnormalities in future generations.