In men with certain types of infertility, higher levels of selenium and N-acetyl-cysteine in semen are strongly linked to better sperm quality, including more sperm, better movement, and better shape.
Scientific Claim
There is a strong positive correlation between seminal plasma concentrations of selenium and N-acetyl-cysteine and sperm concentration, motility, and morphology in infertile men with idiopathic oligo-asthenoteratospermia.
Original Statement
“A significant positive correlation existed between the seminal plasma concentrations of selenium and N-acetyl-cysteine, and semen parameters. 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 correlation coefficients and p-values, which is appropriate for correlational findings. The language 'strong positive correlation' 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.