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Diagnostic accuracy of computer-assisted sperm motion analysis
C De Geyter1, M De Geyter, B Koppers
1Institute of Reproductive Medicine of the University of Münster, Germany.
Human Reproduction (Oxford, England)
|November 7, 1998
Summary
Computer-assisted sperm analysis (CASA) shows high sensitivity but low specificity in predicting in-vitro fertilization (IVF) success. However, CASA can help identify couples who may benefit more from intracytoplasmic sperm injection (ICSI) over standard IVF.
Area of Science:
- Reproductive Medicine
- Andrology
- In-Vitro Fertilization
Background:
- Computer-assisted sperm analysis (CASA) is a tool for evaluating sperm function.
- Predicting fertilization rates in in-vitro fertilization (IVF) remains a challenge.
Purpose of the Study:
- To assess the reproducibility and diagnostic accuracy of CASA for predicting IVF fertilization rates.
- To determine if CASA parameters can identify couples who might benefit from intracytoplasmic sperm injection (ICSI).
Main Methods:
- Retrospective and prospective studies involving 218 couples undergoing IVF.
- Analysis of sperm motion parameters, particularly curvilinear velocity (VCL), using CASA.
- Adjusting inseminated motile sperm count based on median VCL.
Main Results:
- CASA demonstrated high sensitivity (74.0%) but low specificity (40.0%) in predicting fertilization.
- Pregnancy rates were significantly lower in couples with predicted low fertilization rates (5.3%) versus high rates (24.3%).
- Hyperactivated motility parameters showed differences, but absolute numbers were higher in non-fertilizing groups.
Conclusions:
- CASA of washed spermatozoa can aid in selecting patients for ICSI over IVF.
- A definitive threshold for predicting fertilization failure was not identified.
- Generalized sperm function defects may contribute to fertilization failure more than insufficient hyperactivation.