Men’s Health — Genetics, Hormones, Fertility & Prostate Health
Twin research on testosterone, erectile function, prostate cancer, male fertility, hair loss, reproductive hormones, urinary symptoms and PSA biology — separating inherited susceptibility from non-shared biology and environment.
This content is general research information and does not replace medical advice, diagnosis, or individual treatment.
Men’s Health Research
All 8 articles
Article 1 of 8·8 min read
Is Testosterone Genetic? What Adult Male Twins Reveal
Twin studies suggest that circulating testosterone differs partly because of inherited biology — but genes are not a personal diagnosis or a fixed destiny.
Erectile Dysfunction: Genes, Blood Vessels or Both? What Twin Research Shows
A large male twin study found a genetic component to erectile difficulties — without making vascular, metabolic, psychological or medication-related factors disappear.
Why Prostate Cancer Runs in Families — Evidence From Nearly 49,000 Nordic Twin Pairs
The Nordic Twin Study of Cancer found a strong inherited component to prostate-cancer liability — while still leaving substantial room for non-genetic variation.
Male Fertility and Semen Quality: What Twin Studies Can — and Cannot — Tell Us
Danish twin data suggest that some sperm and reproductive-hormone traits are strongly familial, while sperm count may be much more environmentally variable.
Beyond Testosterone: How Heritable Are the Male Reproductive Hormones?
FSH, LH, inhibin B and SHBG can show even stronger familial patterns than testosterone in twin studies — revealing a coordinated reproductive axis rather than one “male hormone”.
Urinary Symptoms in Men: Genes, Age and Environment
Urgency, frequency, nocturia and straining can cluster within families — but a twin study shows that inherited susceptibility is only part of the story.
PSA, Prostate Biology and Family Resemblance: What Twin Studies Can — and Cannot — Tell Us
A twin study found substantial inherited variation in total PSA — but the authors explicitly could not determine whether the same inherited factors also predisposed to prostate cancer.
