IVF Knowledge

  The most common LN2 storage vessel procurement error in UK IVF laboratories is sizing for current inventory. The vessel purchased this quarter needs to perform at peak cycle volume 18 months from now, during a supply delay, and in the 48 hours before a scheduled top-up. Size for worst-case. Not average-case. THE CAPACITY CALCULATION MOST LABS SKIP Count every occupied cane position you have now. Project 24-month growth conservatively. Add 20 per cent for the storage extensions, consent renewals, and samples that stay longer than anticipated. That total is your minimum capacity requirement. THE -130°C NUMBER THAT MATTERS MORE THAN -196°C Liquid nitrogen boils at -195.8°C. Biological activity in cryopreserved samples does not stop at that temperature — it stops at approximately -130°C, where the glassy state prevents ice crystal formation. Vapour phase storage sits between -150°C and -190°C. Both modes maintain below the critical threshold, but the margin narrows as fil...

Most IVF lab dry shipper selection decisions are made on capacity. They should be made on hold time. A dry shipper's capacity tells you how many canes or canisters it can carry. Its hold time tells you how long it can maintain the temperature required to keep your samples viable. For a same-day domestic transfer, these two specifications lead to the same decision. For anything longer, capacity becomes secondary. Cryolab's CryoStork range covers three models. The V2 is compact and lightweight, designed for single-patient and courier-based transfers. The V3 handles routine inter-clinic transfers carrying one to three patients per journey and is the most widely used model in UK fertility clinics. The V10 is the high-volume option, suited to sperm banks, fertility networks, and transfers requiring extended hold times. All three operate in LN2 vapour phase — no free liquid nitrogen during transit, IATA-compliant for air freight, no PI 650 dangerous goods declaration required. Be...

If you are buying a liquid nitrogen dewar for a UK IVF laboratory or fertility clinic in 2026, the decision matters more than the price tag suggests. The wrong vessel will compromise sample integrity, create unnecessary safety risks for your team, and cost significantly more in LN2 consumption over its working life than a well-specified alternative would have. What are the most important specification criteria for IVF use? Hold time. For busy NHS and private fertility units, a hold time of 100 days or more between refills is worth prioritising. Anything shorter adds maintenance overhead and creates more opportunities for temperature management issues. Neck diameter. A wider neck makes sample access more practical, reduces LN2 loss per access event, and improves ergonomics for daily use. Storage capacity in clinical terms - not just litres of LN2, but canister positions and straw count based on your consumable configuration. Which vessels are best suited to UK IVF laboratory use? For NH...

The single most common cryogenic storage mistake made by UK IVF clinics is buying a vessel sized for current inventory without modelling growth. The result is a capacity crisis within two to three years and an unplanned capital purchase that a slightly more careful upfront calculation would have prevented entirely. What information do you need before you can specify the right vessel? You need four things. A count of every straw currently in your system, including patients in long-term storage with no active treatment plan. An honest estimate of net annual growth - new patients adding straws minus patients whose samples are being discharged or disposed of. An understanding of average storage duration, which in the UK now sits longer than it did before the Health and Care Act 2022 extended the maximum storage period to 55 years in some circumstances. And the physical straw capacity of the vessel configurations you are comparing. How is physical straw capacity different from liquid nitrog...

  When people think about IVF, they think about egg collection, fertilisation, and embryo transfer. They almost never think about the tank. That oversight is understandable. The tank is not the emotionally resonant part of the process. But it is the part that determines whether the embryo your patient worked so hard to create is still viable when they come back for it six months, two years, or a decade later. The tank, in formal terms the cryogenic dewar, is a vacuum-insulated vessel designed to hold liquid nitrogen at minus 196 degrees Celsius for extended periods. It is, in every practical sense, a long-term life support system for frozen embryos and gametes. What makes a good dewar for IVF use The fundamental performance metric for a storage dewar is its evaporation rate. Liquid nitrogen evaporates continuously, even in the best-insulated vessels. The difference between a high-quality dewar and a budget alternative often comes down to how fast that evaporation happens. A hi...

If you work in a fertility clinic or research lab, you already know that not all vitrification kits are built the same. The CBS High Security Vitrification Kit from Cryolab is one that has been getting attention across the UK, and for good reason. It uses a closed carrier system which means the sample never comes into direct contact with liquid nitrogen. For labs handling multiple patients, that contamination protection is invaluable. The kit is consistent batch to batch, which matters enormously when you are running high volumes. Cryolab supplies these vit kits directly to laboratories across the United Kingdom. Have a look at the full product listing here: cryolab.co.uk/product/vit-kit/