What methods are used to monitor sperm?

Monitoring sperm health typically involves a comprehensive semen analysis, which is the cornerstone diagnostic test for male fertility evaluation. This laboratory assessment evaluates multiple parameters, including sperm concentration (count per milliliter), total sperm count, motility (percentage of progressively moving, non-progressively moving, and immotile sperm), morphology (percentage of sperm with normal shape according to strict criteria such as Kruger or WHO guidelines), semen volume, pH, liquefaction time, and presence of white blood cells or other abnormalities. Additional specialized tests may be indicated based on initial findings—these include sperm DNA fragmentation testing (e.g., SCSA, TUNEL, or Comet assays) for suspected oxidative stress or apoptosis-related infertility; hormonal profiling (FSH, LH, testosterone, prolactin, inhibin B); genetic testing (karyotype, Y-chromosome microdeletion analysis) in cases of severe oligospermia or azoospermia; and post-coital testing or sperm function assays (e.g., hypo-osmotic swelling test, sperm penetration assay) when unexplained infertility persists despite normal standard parameters. Serial analyses spaced at least two to three weeks apart are often recommended to account for biological variability and ensure reliable interpretation.