Semen Storage Tanks and Containers: A Complete Guide
A semen storage tank is a specialist liquid nitrogen vessel designed for the long-term cryogenic preservation of semen samples at -196 degrees Celsius. Also referred to as a semen container or sperm storage dewar, these cryogenic vessels are used in human sperm banks, IVF clinics, fertility preservation programmes, veterinary reproduction facilities, and livestock breeding operations worldwide.
Semen cryopreservation has been practised since the 1950s, making it one of the oldest and most established applications of cryogenic storage in reproductive medicine. Today, human sperm banks, donor programmes, oncofertility services, and agricultural genetics operations all depend on reliable semen storage tanks to maintain sample viability for years or even decades.
Cryolab has supplied semen storage tanks and cryogenic containers to fertility clinics, sperm banks, and veterinary facilities for over 40 years, backed by ISO 9001:2015 certification and deep specialist expertise in reproductive cryogenics.
Applications of Semen Storage Tanks
Human Sperm Banking
Men facing cancer treatment, vasectomy, or other fertility risks can have semen samples cryopreserved before treatment begins. These samples are stored in semen storage tanks at -196 degrees Celsius until needed, potentially years later. Donor sperm programmes similarly depend on reliable long-term semen containers for the storage and distribution of donor material.
IVF and Assisted Reproduction
IVF clinics use semen storage tanks to hold sperm samples from patients and donors for use in intrauterine insemination (IUI), in vitro fertilisation (IVF), and intracytoplasmic sperm injection (ICSI) cycles. Reliable semen containers are a regulatory requirement in all HFEA-licensed fertility units.
Oncofertility
Sperm cryopreservation before cancer treatment is a standard oncofertility intervention for male patients. Semen samples are collected prior to chemotherapy or radiotherapy and stored in liquid nitrogen tanks until the patient is ready to attempt conception.
Veterinary and Agricultural Applications
Livestock breeding, equine reproduction, and endangered species conservation all rely on semen storage tanks for the long-term preservation of animal genetic material. Bull, stallion, boar, and ram semen are routinely cryopreserved and stored in semen containers for artificial insemination programmes worldwide.
Semen Storage Tank Products from Cryolab
Cryolab supplies liquid nitrogen semen storage tanks and cryogenic containers trusted by IVF clinics, sperm banks, and veterinary facilities worldwide.
 | CryoCan 47-10 LN2 Storage Tank A 47-litre liquid nitrogen semen storage tank featuring ten round canisters, a lightweight design, and market-leading holding times. The CryoCan is widely used in human and veterinary sperm banking programmes for reliable long-term semen preservation at -196 degrees Celsius. |
 | CryoNest XL LN2 Storage Vessel A high-capacity cryogenic semen container designed for sperm banks and IVF clinics requiring large-volume, reliable long-term storage. The CryoNest XL delivers exceptional holding times and storage capacity for high-throughput semen cryopreservation programmes. |
Expert Perspective: Paul Hague, Cryolab
Paul Hague has spent over 40 years at the forefront of cryogenic science and reproductive medicine. He introduced the controlled-rate freezer to Professor Robert Edwards — the Nobel Prize-winning pioneer of IVF — and has attended 42 consecutive ESHRE annual meetings, more than any other delegate in the congress’s history.
“Sperm banking was one of the earliest applications of cryogenic storage in reproductive medicine. I have seen the equipment evolve enormously over four decades, but the principle remains the same — the integrity of every semen sample depends entirely on the reliability of the vessel it is stored in.”
— Paul Hague, Director, Cryolab
How Semen Cryopreservation Works
Sample Collection and Preparation
Semen samples are collected and assessed for volume, concentration, motility, and morphology before cryopreservation. Cryoprotective agents such as glycerol are added to the sample to protect sperm cells during the freezing process.
Freezing
Semen is typically loaded into straws or cryovials and cooled using a controlled-rate freezer or nitrogen vapour protocol before transfer to liquid nitrogen storage at -196 degrees Celsius. Slow cooling is the standard method for sperm, as the small cell size and resilience of sperm cells makes them well suited to this approach.
Storage in a Semen Storage Tank
Once frozen, semen straws or cryovials are stored in a liquid nitrogen semen container at -196 degrees Celsius. At this temperature, biological activity is completely halted and samples remain viable indefinitely under stable storage conditions.
Thawing
When required for clinical use, semen straws are removed from the semen storage tank and thawed rapidly at 37 degrees Celsius in a water bath. Post-thaw motility is assessed before use in IUI, IVF, or ICSI procedures.
Frequently Asked Questions About Semen Storage Tanks
What is a semen storage tank?
A semen storage tank is a liquid nitrogen cryogenic vessel used to store cryopreserved semen samples at -196 degrees Celsius. Also called a semen container or sperm storage dewar, it is used in human IVF clinics, sperm banks, and veterinary reproduction facilities.
What is a semen container?
A semen container is another term for a semen storage tank — a liquid nitrogen vessel designed to hold cryopreserved sperm samples at cryogenic temperatures for long-term preservation. Semen containers are used in both human and veterinary reproductive medicine.
How long can semen be stored in a liquid nitrogen tank?
Semen stored correctly at -196 degrees Celsius can remain viable indefinitely. In clinical practice, successful pregnancies have been achieved from semen stored for over 20 years. In the UK, the HFEA sets initial storage limits with provisions for extension in defined circumstances.
What temperature is used for semen storage?
Semen is stored at -196 degrees Celsius in liquid nitrogen. At this temperature all biological activity is halted, preventing cellular degradation and maintaining sperm viability for long-term storage.
What regulations apply to semen storage tanks in the UK?
In the UK, human semen storage is regulated by the Human Fertilisation and Embryology Authority (HFEA). All facilities storing human sperm must hold an HFEA licence and comply with the HFEA’s Code of Practice covering consent, storage duration, and equipment standards.
