Sperm Banking & Cryopreservation
Cryostorage of Semen and Testicular Sperm
Evidence grade 5 of 5, Settled. Read how the Atlas grades evidence.
The written rationale for this grade is still being prepared.
- FDA
- Tissue banking regulated under FDA tissue rules; not a drug
Reference only. Not medical advice.
This is something to take to a clinician. The Atlas can tell you what is known about sperm banking & cryopreservation in general. It cannot tell you what is happening in your body, and the difference matters most for exactly the symptoms that bring people to this page.
Sperm cryopreservation freezes and stores ejaculated, epididymal, or testicular sperm in liquid nitrogen at approximately -196 degrees Celsius for later use in intrauterine insemination or IVF/ICSI. It is the standard fertility-preservation tool before gonadotoxic cancer therapy, vasectomy, gender-affirming care, or for men with declining or borderline parameters. Long-term cryostorage studies report that storage duration does not meaningfully degrade clinical outcomes, though motility and viability drop during the freeze-thaw cycle itself.
An insurance policy for future fatherhood that decades of data say holds up.
What people take it for
What it is taken for. Approval, where it exists, covers only some of these.
How it works
Semen is collected, mixed with a cryoprotectant (commonly glycerol-based) to limit ice-crystal damage, cooled, and plunged into liquid nitrogen vapor or liquid for indefinite storage. The plasma membrane of sperm is uniquely vulnerable to cryoinjury, so a portion of cells lose motility and viability on thawing; ICSI overcomes low post-thaw numbers by injecting a single sperm into each egg. Surgically retrieved testicular or epididymal sperm can also be frozen, often in small aliquots.
The freeze-thaw tax
Cryopreservation is not lossless. Across studies only roughly 30-40% of sperm remain motile and viable after thawing, driven by ice formation, osmotic stress, and oxidative damage to the membrane. The reassuring counterpoint is that storage time itself appears benign: large series find long-term cryostorage does not impair pregnancy or neonatal outcomes, although some donor-sample data suggest quality declines beyond several years. Banking multiple vials hedges against per-thaw losses.
What it does to fertility
Cryopreservation is itself a fertility-preservation intervention. It is especially critical for men on or considering testosterone or anabolic steroids, since these suppress spermatogenesis; banking before starting exogenous androgens preserves options if the axis does not recover.
What people get wrong
Often saidFrozen sperm 'expires' after a few years
ActuallyProperly stored sperm remains viable for decades; storage duration has little effect on clinical outcomes in large series.
Often saidFreezing ruins the sperm
ActuallyA fraction is lost to cryoinjury, but surviving sperm fertilize normally, and ICSI makes even small surviving numbers usable.
Who profits, and who pushes back
Nobody is named here yet, because we have not done that work on this entry. Read that as unfinished. Somebody almost certainly sells this, and somebody almost certainly disputes it. Assume both until we have checked.
How we got here
Human pregnancies from frozen sperm were reported in 1953 (Bunge and Sherman), using glycerol-based cryoprotection with solid carbon dioxide (dry ice); liquid-nitrogen storage was adopted later. The technique scaled with donor sperm banks through the 1970s-80s and became central to oncofertility once ICSI (1992) allowed even degraded thawed samples to achieve fertilization.
- 1950sFirst human births reported from glycerol-protected frozen sperm
- 1970s-80sCommercial sperm banks proliferate
- 1992ICSI makes low post-thaw counts clinically usable
What we do not know
- How long can sperm remain reliably viable in storage?
- Do at-home collection-and-ship kits match clinic freezing quality?
The market for this
What follows describes how this is bought and sold. It is not a buying guide and it is not an endorsement of any seller.
Costs typically include an upfront collection and freezing fee plus recurring annual storage fees. Pricing varies widely by clinic and region, and long-term storage costs can accumulate substantially over decades.
At a glance
- Storage temperature
- ~-196 degrees C (liquid nitrogen)
- Typical post-thaw viability
- ~30-40% of sperm
- Common cryoprotectant
- Glycerol-based media
- Storage durability
- Viable for decades
- Best use with low counts
- ICSI
What this entry does not yet cover
What follows is unfinished work on our side, not a finding about Sperm Banking & Cryopreservation. A short entry is not a safe entry.
- Supply chain. We have not mapped where it is made.
- Who uses it. We have not documented the user groups.
- What could change. No forward-looking summary yet.
- How it compares. We have not set it against the alternatives.
- Children and teenagers. We have not checked what is known about younger people.
- What can go wrong. We have not written the risk line for this one. Read the safety section below rather than treating its absence as reassurance.
- Where we land. We have not taken a position on this yet.
Sources
The studies below are named and described, but not linked. You cannot open them from here and check our reading against them, which means this page is our summary of the literature rather than a document you can verify. Weigh it accordingly until the links exist.
The studies that matter
Long-term cryostorage outcomes analysis (Fertility and Sterility)2019
Long-term cryostorage of semen did not affect clinical pregnancy or live-birth outcomes
Regional sperm-banking cohort for cancer patients2021
Documented use rates and successful reproductive outcomes in survivors over a 15-year program