The Claim
In men seeking fertility evaluation, right testicular volume below 15 mL is independently associated with lower sperm concentration, lower sperm motility, and lower total testosterone levels, and predicts low testicular function with 66.7% sensitivity and 62.4% specificity.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
In men evaluated for fertility, a right testicle volume under 15 mL is linked to lower sperm count, reduced sperm movement, and lower testosterone levels, and correctly identifies reduced testicular function in about two-thirds of cases.
See the scientific wording
In men seeking fertility evaluation, right testicular volume is independently associated with sperm concentration, sperm motility, and total testosterone levels, with a volume below 15 mL predicting low testicular function with 66.7% sensitivity and 62.4% specificity, suggesting it may serve as a non-invasive clinical indicator of reproductive health.
When the testicle is smaller than 15 mL, the tubes that make sperm are fewer or damaged, and the cells that produce testosterone are reduced. This causes fewer sperm to be made, those sperm move slower, and less testosterone enters the blood.
What the research says
1 studyIn men checked for fertility problems, a smaller right testicle (under about 15 mL) is linked to lower sperm count, slower sperm, and lower testosterone — and doctors can use this size to guess if someone has reduced fertility about two-thirds of the time.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.