Sperm freezing (Sperm cryopreservation and storage)
Collecting and freezing sperm so it can be stored and used for fertility treatment in the future.
✓ Medically reviewed by a GMC-registered consultant · last reviewed September 2026 · next review September 2027 · how we review
In short
- Sperm is frozen and stored in liquid nitrogen so it can be used for fertility treatment in the future.
- It protects future options but does not guarantee a baby, which still depends on sperm quality, your partner's eggs and the treatment used.
- In the UK sperm can be stored for up to 55 years, but you must renew your consent every 10 years or it must be removed.
- Before freezing, you are screened for HIV and hepatitis, and you complete HFEA consent forms covering how your sperm can be stored and used.
A plain-English summary. The detail — including risks and recovery — is below.
At a glance
A general guide. Your specialist will give you advice for your situation.
Protects your chance of a genetically related child if future fertility is at risk.
When there is no realistic future use for the sperm and storage would not help you.
You produce a sample and can carry on with your normal day straight away. There is no recovery needed for a standard sample.
Clear written confirmation of what was frozen, the storage terms and the renewal dates.
You produce a sample and can carry on with your normal day straight away. There is no recovery needed for a...
The laboratory examines the sperm and confirms whether it is suitable to freeze. You may be asked back to bank...
Storage can only go ahead once your HIV and hepatitis screening results are back and your consent is complete.
Your sperm is stored in liquid nitrogen until you need it. You will need to renew your consent every 10 years for...
What is sperm freezing?
Sperm freezing (cryopreservation) is a way of storing sperm at a very low temperature in liquid nitrogen so it can be thawed and used for fertility treatment later. It is a way to protect your chance of having a genetically related child in the future.
People freeze sperm for several reasons: before cancer treatment or other medical treatment that may harm fertility, before surgery such as a vasectomy or gender-affirming treatment, if sperm quality is falling, before a job or situation with a high risk to fertility, or to store donor sperm. Sperm can also be frozen after surgical sperm retrieval when there is none in the semen.
Stored sperm is usually used later with fertility treatment such as IUI (intrauterine insemination), IVF or ICSI, rather than for natural conception. Freezing does not guarantee a future baby, because that still depends on the quality and amount of sperm, your partner's eggs, and the treatment itself.
In the UK, storing and using sperm is regulated by the HFEA (Human Fertilisation and Embryology Authority). Sperm can be stored for up to 55 years, but you must renew your consent every 10 years for storage to continue lawfully.
Types, options & approaches
There may be different ways to do this. The right approach depends on the clinical question and your circumstances.
Sperm freezing vs egg freezing
| Sperm freezing | Egg freezing | |
|---|---|---|
| Who it is for | People who produce sperm | People who produce eggs |
| How it is collected | Usually a sample, no surgery | Egg collection under sedation |
| Hormone injections | No | Yes, about 2 weeks |
| Storage limit | Up to 55 years | Up to 55 years |
Sperm freezing is simpler and less invasive than egg freezing, which needs hormone stimulation and a minor procedure. Both store cells for future treatment and have the same UK storage limit and consent rules.
Preparing for your treatment
- If freezing before medical treatment, ask to be referred quickly so it does not delay your cancer or other treatment.
- Be screened for HIV and hepatitis B and C, as this is required before sperm can be frozen and stored.
- Avoid ejaculation for the period the clinic advises (often a couple of days) before giving a sample, to help quality.
- Plan for one to a few visits, as banking more than one sample can give a better store of sperm.
- Complete the HFEA consent forms carefully, including how your sperm may be used and what happens to it if you die or lose capacity.
- Think about who, if anyone, you would want to be able to use your sperm, as this must be set out in your consent.
- Ask about storage length, the need to renew consent every 10 years, and how you will be contacted.
What happens
For a normal sample, you produce semen by masturbation, usually in a private room at the clinic; some clinics allow a sample produced at home if it reaches the laboratory quickly. The sample is examined to check the number, movement and quality of the sperm.
The sperm is then mixed with a protective fluid and frozen slowly, or rapidly, and stored in tanks of liquid nitrogen at a very low temperature. Freezing can reduce how many sperm survive thawing, which is one reason more than one sample is often banked.
If there is no sperm in the semen, sperm can instead be collected by a minor surgical procedure (such as TESA, TESE or PESA) and frozen. Before any sperm is stored, you must have been screened for HIV and hepatitis and have completed the HFEA consent forms. The frozen sperm is then stored until you need it, within the legal time limits.
Is this treatment right for me?
A good consultation should explore whether it's the right choice for you now — including reasons to wait or consider something else.
May not be suitable if…
- When there is no realistic future use for the sperm and storage would not help you.
- When screening for HIV or hepatitis is positive in a way that affects storage arrangements, which the clinic will manage separately.
- When a normal sample cannot be produced and surgical retrieval is not appropriate or wanted.
- When you have not been able to complete the HFEA consent that storage legally requires.
Delay or rearrange if…
- Your HIV and hepatitis screening results are not yet back.
- You have an illness or are too unwell to produce a sample, though urgency before cancer treatment must still be respected.
- You have not yet completed the HFEA consent forms.
- You need more time to decide who may use the sperm and what should happen to it.
- There is a short, safe window to bank a better-quality sample on the clinic's advice.
Alternatives to discuss
- Surgical sperm retrieval if a normal sample cannot be produced or there is no sperm in the semen.
- Freezing embryos with a partner instead, if that suits your situation.
- Using donor sperm in the future if no usable sperm can be stored.
- Not freezing, accepting the risk to future fertility, after counselling.
- Conceiving sooner, where that is realistic, rather than storing sperm.
Before you decide
Use this as a shared-decision checklist. The aim is not just “can this be done?”, but whether it is right for you, now, with the risks and alternatives clearly understood.
What matters most to me?
Think about symptoms, daily life, work, caring responsibilities, sport, fertility, travel, appearance and anxiety — the right choice depends on your priorities, not just the medical facts.
What are all my options?
Ask about waiting, monitoring, medicines, rehabilitation, a smaller or larger procedure, a different test, NHS referral, or a second opinion where that would help.
What would make me pause?
Active infection, pregnancy, unstable medical problems, smoking, medicines that increase bleeding, poor support at home, or feeling pressured are all reasons to slow down and get tailored advice.
What happens if I do nothing today?
For some problems, waiting is safe; for others, delay can make treatment harder. A good consultation should explain the trade-off in plain English.
Benefits
- Protects your chance of a genetically related child if future fertility is at risk.
- Lets you have treatment, such as cancer treatment, without losing the option of biological children.
- Can be done quickly and simply for a normal sample, without surgery or hormones.
- Stored sperm can be used for several types of treatment, including IUI, IVF and ICSI.
- Gives peace of mind and time to make decisions without pressure.
Risks & complications
- Some sperm not surviving the freezing and thawing process
- Finding the sample lower in number or quality than hoped when it is checked
- Anxiety or pressure around producing a sample, especially at a stressful time
- The need to keep paying storage fees and to renew consent over time
- Not being able to produce a sample, so surgical retrieval is considered instead
- Stored sperm being too limited in amount for some treatment options
- Losing track of renewal dates, risking the sperm being removed from storage
- Loss of stored samples through a storage or equipment failure at the clinic
- Legal or consent complications about who can use the sperm, for example after a relationship ends or after death
Sperm freezing itself is low-risk and does not involve surgery for a normal sample. The main issues are practical and emotional: some sperm do not survive thawing, the stored amount may limit your options, and you must keep your consent and contact details up to date so the sperm is not lost. Freezing protects options but does not guarantee a future baby.
Published figures to discuss
There are no meaningful 'success rates' for the act of freezing itself; what matters is how much usable sperm survives thawing and what treatment it allows later. This depends on the starting quality and amount of sperm and how it is used. Because outcomes are mostly determined at the later treatment stage, this guide does not quote freezing 'success' percentages.
| Figure | Reported range | How to interpret it | Source / confidence |
|---|---|---|---|
| Physical harm from producing a sample | Very low | The main difficulties are practical, emotional or timing-related rather than medical. | Guide sourcesClinical context |
| Thaw survival and future usability | Variable and dependent on starting sperm quality | Freezing preserves options, not a guarantee. Later use may require IUI, IVF or ICSI depending on post-thaw quality. | Guide sourcesClinical context |
| Sample too poor or absent on the day | Recognised | Illness, fever, cancer treatment urgency, ejaculation difficulty or severe male-factor infertility can limit what is stored. | Guide sourcesClinical context |
| Consent and storage lapse | Clinically important | Patients must understand storage duration, renewal, contact details, death/incapacity consent and fee arrangements. | HFEA — Fertility preservationhfea.gov.ukSource-linked context |
These are literature figures, not a personalised prediction. Your own risks and likely benefits depend on your circumstances, your health, and how your care is carried out and followed up.
What happens afterwards
There is no physical recovery from freezing a normal sample. The 'afterwards' is mostly the quality check confirming the sample was suitable to freeze, and then long-term storage until you need it.
- No physical after-effects from producing a normal sample
- Feeling relieved, or sometimes anxious, about the result of the quality check
- Being asked to come back to bank more than one sample
- A wait for screening results before storage is confirmed
- Occasional reminders from the clinic to renew consent over the years
Aftercare
- Make sure your HIV and hepatitis screening is completed so storage can go ahead.
- Complete and keep a copy of your HFEA consent forms, including who may use the sperm.
- Keep your contact details up to date with the clinic so you receive renewal reminders.
- Note when your consent needs renewing (every 10 years) so the sperm is not removed.
- Keep a record of the clinic, storage details and any storage fees due.
- If you had surgical retrieval, follow the separate wound-care advice for that procedure.
- Contact the clinic if your circumstances change, for example a relationship change affecting consent.
- HIV and hepatitis screening completed
- HFEA consent forms signed and a copy kept
- Decision recorded about who may use the sperm
- Contact details up to date with the clinic
- Storage and renewal dates noted
- Storage fees and payment plan understood
- Clinic contact number saved
⚠ Get urgent help if…
- Feeling unable to cope emotionally with a fertility-threatening diagnosis or treatment
- Realising your stored sample may not be enough for the treatment you want
- Approaching a consent renewal deadline you have not actioned
- A change in circumstances, such as a relationship ending, that affects your consent
- Any concern that your treatment may start before sperm has been frozen (raise this urgently)
Who to contact: your clinician, clinic or test provider first (keep their number to hand). For urgent advice when you can't reach them, call NHS 111. In an emergency, call 999.
General guidance — it doesn't replace the specific advice your specialist gives you.
Results & realistic expectations
A 'good' result is freezing one or more samples with enough good-quality sperm to give realistic options for future treatment. The quality check tells you whether the sample was suitable, and banking more than one sample often gives a better store.
Stored sperm gives you options, but it is not a guarantee of a future baby. Success later depends on how much usable sperm survives thawing, your partner's eggs, and the type of treatment, such as IUI, IVF or ICSI. Your clinic can explain what your stored sperm is likely to allow.
In the UK, sperm can be stored for up to 55 years, but you must renew your consent every 10 years for storage to continue lawfully; if you do not, the clinic is legally required to remove and dispose of it. Frozen sperm generally remains usable over long periods if stored correctly. Keeping your contact details current is essential so you receive renewal reminders.
Related tests, treatments or support
Sperm freezing is closely linked to fertility preservation before cancer treatment, to surgical sperm retrieval (when there is no sperm in the semen), and to later treatment with IUI, IVF or ICSI. It is also the basis of donor sperm storage. Your clinic can explain how freezing now fits with the treatment you may have later.
Follow-up & long-term care
After freezing, follow-up is mainly administrative: confirming screening and consent, arranging any further samples, and managing storage and renewal over time. When you are ready to use the sperm, a fertility clinic will review your store and plan the right treatment. Renewal reminders should come from the clinic, but keeping your details up to date is your safeguard.
- Renew your consent every 10 years so storage can lawfully continue.
- Keep your contact details up to date with the clinic so you receive reminders.
- Keep up with any storage fees to avoid losing your stored sperm.
- Review your store with a clinic when you are ready to try for a pregnancy.
- Update your consent if your circumstances or wishes change.
Repeat, follow-on and what comes next
- More than one sample is often banked because some sperm do not survive thawing.
- If a stored sample is too limited, further freezing or surgical retrieval may be considered.
- Stored sperm can be used over many years if consent is renewed and fees are kept up.
- Whether stored sperm leads to a baby is decided at the later treatment stage, not at freezing.
Ask what happens if the result is unclear or needs repeating, and what is included if further tests or follow-up are needed.
What good aftercare looks like
- Clear written confirmation of what was frozen, the storage terms and the renewal dates.
- Reliable reminders to renew consent, plus your own note of the deadlines.
- Easy ways to update consent and contact details when circumstances change.
- A clear route to a fertility clinic when you are ready to use the sperm.
- Counselling available, especially when freezing is linked to a difficult diagnosis.
What affects the cost
Costs vary a great deal between people and providers, and we don't publish prices. What matters is understanding what drives the cost and making sure your quote is complete. The main things that affect it:
- The initial freezing of the sperm and the laboratory quality check.
- How many samples you bank, as more samples may cost more.
- Whether sperm is produced normally or collected by a surgical procedure (charged separately).
- Screening tests before freezing.
- Ongoing yearly storage fees.
- Consultations and any counselling.
- Later treatment (IUI, IVF or ICSI), which is a separate cost when you use the sperm.
- What the initial freezing fee covers, including the quality check.
- Any charge per additional sample banked.
- Yearly storage fees and how long they are guaranteed at that price.
- Screening test costs.
- How and when consent is renewed, and any charge for it.
- What happens to fees if you stop storage or transfer it to another clinic.
- That the cost of later treatment when you use the sperm is separate.
On the NHS? Sperm freezing is funded on the NHS for some people, particularly before treatment that may harm fertility such as cancer treatment. Funding rules are not the same everywhere in the UK: England, Wales, Scotland and Northern Ireland each set their own criteria, which can also differ by local area and change over time. NICE guidance (NG257) sets out the clinical recommendations for England, but it does not by itself decide who gets NHS funding. To find out what you are entitled to, ask the relevant NHS or HSC fertility commissioner, or your clinic, to confirm the current eligibility rules where you live. In other situations many people pay privately.
You're entitled to your total cost in writing — including reports, follow-up and what happens if the result is inconclusive — before you decide.
Consent traps and marketing red flags
These are not small details. They are often where patients lose choice, time to reflect, or realistic expectations.
Consent traps
- Not understanding the 10-year consent renewal rule and the risk of losing the sample.
- Not setting out clearly who may use the sperm and what happens if you die or lose capacity.
- Assuming freezing guarantees a future baby rather than protecting options.
- Not realising that storage requires HIV and hepatitis screening first.
- Not keeping contact details up to date, so renewal reminders are missed.
Marketing red flags
- Promising that freezing 'guarantees' future fatherhood.
- Unclear or escalating storage fees, or long contracts that are hard to leave.
- Not explaining the consent renewal rule or screening requirement.
- Pressure to bank many samples without a clear reason.
- No mention of what happens to the sperm if you die, lose capacity or change your mind.
Choosing a specialist safely
- Check the specialist is on the GMC Specialist Register for this area.
- Make sure they work at a CQC-registered service, and look for membership of the relevant Royal College or professional body.
- You're entitled to time to consider and to have your questions answered before you agree — the specialist who looks after you should explain it, not a salesperson.
- Be wary of pressure: time-limited offers or deposits taken before you've had time to think are red flags, not bargains.
- You're entitled to your total cost in writing — including any follow-up — before you decide.
Questions to ask your medical professional
Take this to your consultation. A good specialist will welcome every one of these.
- If I am facing treatment that may harm my fertility, how quickly can sperm be frozen so it does not cause delay?
- How many samples do you recommend I bank, and why?
- What does the quality check tell me about my future treatment options?
- What are the storage fees, and how and when do I renew my consent?
- Who will be able to use my sperm, and what happens to it if I die or lose capacity?
- What happens if I cannot produce a sample on the day?
- Are you on the GMC Specialist Register for this area, and which Royal College or professional body are you a member of?
- Will you be the specialist who carries out my treatment, and who looks after me afterwards?
- What are the risks for someone like me, and how often do your own patients have a problem or need it repeated or redone?
- What does a realistic result look like — and what can this treatment not achieve?
- What are my options, including waiting, doing nothing for now, or choosing a different approach?
- Can I have written information, results and aftercare instructions in a format I can use, including any accessibility or communication support I need?
- What is the total cost in writing, including any follow-ups, and how much time do I have to decide?
Frequently asked questions
How long can sperm be stored?
Does freezing damage the sperm?
Will it guarantee I can have a baby later?
Can I freeze sperm on the NHS?
What if I can't produce a sample?
Who can use my frozen sperm?
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How we made this page
Medically reviewed by a GMC-registered consultant. Written in plain English, checked against NHS, NICE, GMC and relevant Royal College / specialist-society guidance, and kept under review. No clinic paid to appear on this page, and we publish no pricing. This is general information to help you prepare — it is not a substitute for advice from your own clinician. How we review our guides →
Source hierarchy: UK regulator and NHS/NICE guidance first, then relevant Royal College or specialist-society guidance, then peer-reviewed evidence for procedure-specific figures where available.
Sources & standards: HFEA — Fertility preservation HFEA — Consent to treatment and storage NHS (Guy's and St Thomas') — Fertility preservation for men NHS — Infertility treatment NICE — Fertility problems: assessment and treatment (NG257) NHS inform (Scotland) — Infertility and fertility access NHS Wales — Specialist fertility services commissioning policy (CP38) Northern Ireland — Regional Fertility Centre (Belfast Trust)
Reviews reflect patients' experience of care, not clinical outcomes. For procedure volumes and outcome data see PHIN.
Last medically reviewed 2026-09-21. Spotted something wrong or out of date? Report an error in this guide.
Related guides: Fertility preservation before cancer treatment · Surgical sperm retrieval (TESA / TESE / PESA) · IVF · Assisted hatching · Blastocyst culture