The main sign of male infertility is inability to conceive after 12 months of regular unprotected intercourse. Other signs include: sexual dysfunction (ED, low libido), pain or swelling in testicles, abnormal breast growth, decreased body hair, and recurrent respiratory infections. A semen analysis is the definitive test.

Signs of male infertility include: problems with sexual function (difficulty ejaculating, reduced sexual desire, erectile dysfunction), pain or lump in testicular area, recurrent respiratory infections, inability to smell, abnormal breast growth (gynecomastia), decreased facial or body hair, and low sperm count.

You cannot definitively tell if a man is infertile by appearance alone. However, some visible signs may indicate fertility issues: decreased body/facial hair, gynecomastia (male breast tissue), obesity, or visible varicocele. Most infertile men appear completely normal, which is why testing is essential.

Men don't become completely infertile at a specific age like women do with menopause. However, male fertility gradually declines after age 40. Sperm quality decreases, leading to lower counts, reduced motility, and more DNA damage. Men over 45 take longer to conceive and have higher risks of miscarriage.

Many causes of male infertility can be treated successfully. Varicocele repair, hormone treatments, antibiotics for infections, and lifestyle changes can restore fertility. Even with severe male factor infertility, assisted reproductive technologies like IVF with ICSI can help achieve pregnancy. Only certain genetic conditions cannot be cured.