Semen Analysis in London

What a Semen Analysis Measures

If you are trying to conceive, or simply want clarity, a semen analysis is the first and most important step. At Marylebone Diagnostic Centre we offer fast, discreet, accurate sperm testing in Central London, reviewed to our Marylebone High Standard using advanced CASA technology.

One test assesses every key marker of male fertility:

• Sperm count (concentration): how many sperm per millilitre
• Motility: the percentage swimming forward
• Morphology: the shape and structure of the sperm
• Volume, pH & viscosity: overall sample quality

Normal Ranges Explained

A quick reference for what a healthy result looks like.

• Semen volume (≥ 1.4 ml): the total amount of semen produced. Low volume may indicate issues with ejaculation or gland function.
• Sperm count / concentration (≥ 16 million/ml): commonly referred to as sperm count. Lower levels may reduce fertility potential.
• Total sperm number (≥ 39 million per sample): the total number of sperm in the entire ejaculate, a more complete assessment than concentration alone.
• Total motility (≥ 42%): the percentage of sperm that are moving. Adequate movement is essential for sperm to reach the egg.
• Progressive motility (≥ 30%): the proportion of sperm moving actively forward, the most important type for natural conception.
• Morphology, normal forms (≥ 4%): the percentage of normally shaped sperm. Abnormal forms may affect the ability to fertilise an egg.

Seeing numbers marked in red on your report? Our guide explains low motility, borderline morphology and what each marker means: Semen Analysis Results Explained.

Same-Day Semen Analysis in London

When it comes to fertility, time and peace of mind matter most. Unlike clinics that ship samples to external labs, risking delays and temperature changes that affect accuracy, we process your sample in our own Baker Street laboratory.

• Fast appointments: same-day or next-day availability
• On-site testing: processed in our dedicated London lab
• Rapid results: comprehensive report within 24 hours

Who Should Consider a Sperm Test?

A semen analysis gives you a clinical baseline so you can make informed decisions about your fertility. Consider booking if any of these apply:

• Trying to conceive for 6-12 months
• Preparing for IVF, ICSI or sperm freezing
• Want a baseline fertility check
• Previous miscarriage or failed IVF
• Low libido or hormonal concerns
• History of testicular injury, surgery or STIs

Semen Analysis vs DNA Fragmentation

Standard semen analysis assesses the external health and physical quality of the sperm (count, motility, morphology, volume and pH). It is the recommended first step.

DNA fragmentation testing assesses the internal genetic integrity of the sperm, which a standard test cannot detect. You can have normal results but still face high DNA damage, affecting embryo development, IVF success and miscarriage risk.

Many patients combine both tests for a complete fertility picture.

Learn about DNA fragmentation and hormone testing

How to Prepare for Accurate Results

• Abstinence: avoid ejaculation for 2-5 days before the test
• Moderation: reduce alcohol and smoking
• Temperature: avoid saunas, hot tubs and tight clothing
• Tell us if you have had a fever in the last 3 months

A full sperm regeneration cycle takes around 74 days, so lifestyle changes show the best results over about 3 months.

Performed by a Qualified Clinical Team

Every sample is analysed by trained biomedical scientists and reviewed under our clinical governance led by Dr Lauren. We are CQC-accredited and aligned with the Marylebone High Standard, with optional teleconsultations to discuss your results.

• Results delivered within 24 hours
• Samples processed on-site, never shipped to an external lab
• Discreet private rooms, no GP referral required
• Trusted by patients across London and the UK

Complete Your Fertility Picture

• Male Fertility Profile: a blood profile assessing the key hormones (FSH, LH, Testosterone, Prolactin) that influence sperm production.
• DNA Fragmentation Test: advanced testing for the genetic integrity of sperm, important for IVF success and miscarriage risk.
• Couples' Assessment: a synchronised evaluation for both partners to plan the next steps together.

Comparing NHS vs private, or want a full price breakdown? See our Sperm Test Cost in London: NHS vs Private guide.

Visit Our Central London Clinic

Just a 5-minute walk from Baker Street Station, easily accessible from across London and the Home Counties.

• Address: Marylebone Diagnostic Centre, 73 Baker Street, London W1U 6RD
• Phone: +44 7495 970109
• Hours: Mon-Sat, 8:00-16:00