Male Fertility Basics

Male factor contributes to roughly half of fertility challenges. Sperm quality reflects recent weeks of health — changes take 2–3 months to show in a new test.

What semen analysis checks

• Sperm count
• Motility (how well sperm swim)
• Morphology (shape)
• Volume

A semen analysis is the main first test for men. It's simple and non-invasive, and because sperm production runs in roughly 2–3 month cycles, doctors often repeat it after a few weeks before drawing conclusions — a single below-average result is common and doesn't automatically mean a problem.

What affects sperm health

• Smoking, heavy alcohol use, and recreational drugs
• Being significantly overweight
• Prolonged heat — hot tubs, saunas, laptops on the lap, very tight underwear
• Some medications, anabolic steroids, and untreated infections
• High, sustained stress and poor sleep

Lifestyle changes that help

Quit smoking, limit alcohol, maintain a healthy weight, avoid prolonged heat, and prioritize sleep. Eat a balanced diet, stay active, and give changes a couple of months to show — that's how long new sperm take to mature. Test alongside your partner if TTC takes longer than expected.

What a below-average result means

A low count, poor motility or abnormal shape doesn't mean conception is impossible — it often just lowers the odds in any given cycle. Depending on the cause, options range from lifestyle changes and treating an underlying issue, to IUI or IVF with ICSI, where a single healthy sperm is injected directly into an egg. A specialist can explain which, if any, applies to your particular results.

When to speak to a doctor

See a doctor if you and your partner have been trying for 12 months without success (6 months if she is 35 or older), or sooner if you've had testicular injury or surgery, an undescended testicle in childhood, previous cancer treatment, difficulty with erections or ejaculation, or a very low semen analysis result. Fertility is a shared issue, so getting checked early helps you both.

Common myths

• Fertility problems are usually the woman's — men are involved about half the time
• You can tell sperm quality from how you feel or look — only a test shows it
• Age doesn't matter for men — sperm quality does decline gradually with age
• One normal result is enough — doctors often repeat the test to be sure

If you're trying to conceive, our trying to conceive guide and the when to seek help article explain the next steps, and the planning parenthood hub covers fertility in more detail.

This article is for general education and is not a substitute for personalised medical advice. Speak with a qualified doctor about your specific situation.