Is conventional sperm analysis of any use?

Area of Science:

• Reproductive Medicine
• Andrology
• Statistical Analysis in Medicine

Background:

• Male infertility affects a significant number of couples seeking conception.
• Accurate prognostic indicators are crucial for guiding fertility treatments and counseling.
• Traditional semen analysis parameters include volume, motility, density, and morphology.

Purpose of the Study:

• To evaluate the prognostic significance of individual semen parameters (volume, motility, density, morphology) in predicting future conception.
• To determine if specific semen parameters offer independent prognostic value.
• To develop a tool for advising couples on their likelihood of natural conception.

Main Methods:

• Retrospective analysis of computerized records from 867 couples.
• Utilized the couple-months statistical method, accounting for duration of infertility (trying time).
• Assessed the independent prognostic contribution of semen volume, motility, density, and morphology.

Main Results:

• Both sperm motility and density were found to provide independent prognostic information.
• A combined score (motility × density) exceeding 0.5 million motile sperm/mL was identified as a key threshold.
• A table of estimated conception probabilities based on these parameters is presented.

Conclusions:

• Semen motility and density are significant independent predictors of male fertility prognosis.
• A single semen analysis can be sufficient for prognosis if the motility-density product exceeds 0.5 million/mL.
• These findings can aid clinicians in counseling couples regarding their chances of conception.