In men with certain types of infertility, the total amount of selenium and N-acetyl-cysteine in semen is strongly linked to better sperm quality, including more sperm, better movement, and better shape.
Scientific Claim
The combined concentration of selenium and N-acetyl-cysteine in seminal plasma is strongly correlated with sperm concentration (r = 0.67), motility (r = 0.64), and morphology (r = 0.66) in infertile men with idiopathic oligo-asthenoteratospermia.
Original Statement
“A strong correlation was observed between the sum of the selenium and N-acetyl-cysteine concentrations, and mean sperm concentration (r = 0.67, p = 0.01), sperm motility (r = 0.64, p = 0.01) and percent normal morphology (r = 0.66, p = 0.01).”
Evidence Quality Assessment
Claim Status
appropriately stated
Study Design Support
Design supports claim
Appropriate Language Strength
association
Can only show association/correlation
Assessment Explanation
The study reports specific correlation coefficients and p-values, which is appropriate for correlational findings. The language accurately reflects the statistical analysis performed.
Evidence from Studies
Supporting (1)
Efficacy of selenium and/or N-acetyl-cysteine for improving semen parameters in infertile men: a double-blind, placebo controlled, randomized study.