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Index/Topics/WHO reference ranges

WHO reference ranges

World Health Organization reference ranges for semen quality, with age-specific reference ranges being recommended

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3 results
Feb 2, 2026

Why is it when I jerk off to guys I don't produce semen but when I'm jerking to a woman I do

of visible semen during masturbation to male stimuli but normal ejaculation with female stimuli can come from several overlapping causes: (including ), variation in orgasm intensity and arousal that a...

Feb 1, 2026

How reversible are semen-volume reductions after lifestyle interventions in men over 40?

in men over 40 are partly reversible when the cause is modifiable — for example dehydration, recent frequent ejaculation, smoking, excessive alcohol, obesity, or certain medications — but declines dri...

Jan 10, 2026

What role do hydration, ejaculation frequency, and sexual health play in semen production after 50?

Hydration, ejaculation frequency and broader sexual health each influence semen production after age 50, but in different ways: hydration affects seminal fluid volume and motility, ejaculation frequen...

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