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Intracytoplasmic sperm injection (ICSI) and chromosomally abnormal spermatozoa
P A In't Veld1, F J Broekmans, H F de France
1Department of Clinical Genetics, Erasmus University and University Hospital, Rotterdam, The Netherlands.
Human Reproduction (Oxford, England)
|April 1, 1997
Summary
Intracytoplasmic sperm injection (ICSI) enabled fertilization despite sperm abnormalities. Molecular analysis revealed significant de-novo chromosome errors in sperm, impacting male fertility.
Area of Science:
- Reproductive biology
- Human genetics
- Assisted reproductive technology
Background:
- Primary infertility and severe oligoasthenoteratozoospermia (OAT) in the male partner necessitated assisted reproductive technology.
- Intracytoplasmic sperm injection (ICSI) was the chosen method due to the male factor infertility.
Observation:
- Sperm cells exhibited morphological abnormalities, including unusual head size and multiple tails.
- Despite morphological defects, these sperm cells successfully fertilized oocytes following ICSI.
Findings:
- Molecular cytogenetic analysis revealed widespread de-novo chromosome abnormalities in the sperm.
- Analysis showed 40% diploidy and 24% triploidy, alongside sex chromosome aneuploidy in the sperm population.
Implications:
- This case highlights the potential of ICSI to overcome severe sperm defects for achieving fertilization.
- The findings underscore the importance of comprehensive genetic analysis in cases of male factor infertility and ICSI failure.
- Understanding the prevalence of de-novo chromosomal abnormalities in sperm is crucial for genetic counseling and reproductive outcomes.