What Does Semen Colour Mean? When to Worry and When to Test

Semen colour can tell you more than you think.

While many changes are harmless, some may signal an underlying issue. The key is knowing what is normal and when to act.

What Colour Should Semen Be?

Healthy semen is usually:

• Whitish-grey
• Slightly cloudy
• Jelly-like in texture

You can view a full breakdown in our
semen colour chart guide – Check Your Sperm Colour here

Common Semen Colours and What They Mean

⚪ White or Grey (Normal)

This is the typical healthy appearance.

🟡 Yellow Semen

Usually harmless, but may be caused by:

• Urine mixing
• Diet (e.g. turmeric)
• Vitamins

 If persistent, testing is recommended.

🟢 Green Semen

May indicate infection.

This requires medical attention.

🔴 Red or Brown Semen

May indicate blood in semen (haematospermia).

Possible causes:

• Infection
• Inflammation
• Prostate issues

This should always be investigated.

💧 Watery Semen

May suggest low sperm concentration.

semen analysis in London
can confirm sperm count and quality

When Should You Be Concerned?

You should consider testing if:

• Colour changes persist
• You notice blood
• Semen appears consistently watery
• You have pain or discomfort

A simple
sperm analysis
can provide clear answers.

What Tests Can Help?

1. Semen Analysis

This is the first and most important test.

It measures:

• Sperm count
• Motility
• Morphology
• Volume

You can
book a semen analysis
with results in 24 – 42 hours.

2. Sperm Antibody Testing

In some cases, the immune system affects sperm.

This includes:

• Antisperm antibodies
• MAR test
• ASA test

These can impact fertility even if sperm count appears normal.

3. Hormone Testing

Hormonal imbalance may affect semen quality.

Male Infertility Profile
can help identify underlying causes.

4. Advanced Sperm Testing

Standard tests may miss deeper issues.

DNA fragmentation test
assesses sperm DNA quality.

Can Semen Colour Affect Fertility?

Sometimes, yes.

Abnormal colour may be linked to:

• Infection
• Low sperm count
• Inflammation
• Oxidative stress

This is why testing is important rather than guessing.

Why You Should Test Early

Many men ignore early signs.

However:

• Male factor contributes to ~50% of infertility
• Early testing improves outcomes
• Delays can reduce options

Start with a
semen analysis
to understand your fertility.

Frequently Asked Questions

Is yellow semen normal?

Often yes, but persistent changes should be checked.

Is watery semen a problem?

It may indicate low sperm count and should be tested.

Does semen colour affect pregnancy?

It can reflect underlying issues that impact fertility.

Should I see a doctor?

If symptoms persist, testing is recommended.

Take Control of Your Fertility

Semen colour changes are common, but they should not be ignored.

With the right testing, you can understand your health and take action early.

Book your
semen analysis in London
today and get answers within 24–42 hours.

Marylebone Diagnostic Centre

• 📞 +44 7495 970109
• 📍 73 Baker Street, London W1U 6RD
• 🕘 Monday–Saturday, 8:00–16:00
• 🚶 5-minute walk from Baker Street station