IVF Knowledge

In an IVF laboratory, the equipment gets the attention. Storage vessels are specified carefully. Controlled rate freezers are calibrated. Dry shippers are verified before every transfer. And then the consumables order goes through on autopilot. Cryocanes, cryosleeves, visotubes, and goblets are small, inexpensive, and ordered in bulk. They do not have service intervals. They are, in the language of laboratory procurement, consumables - implying that one is as good as another. That assumption is wrong, and in a licensed clinical setting, it carries real consequences. The Role Consumables Actually Play in Sample Safety Every cryopreserved sample in an IVF laboratory passes through a chain of consumables before it reaches the storage vessel. A goblet holds the visotube or straw carrying the sample. The goblet loads onto a cryocane. The cryocane, protected by a cryosleeve, is suspended inside the vessel. Each link in that chain has a job to do - and each one can fail. The failure modes are...

    Walk into two IVF laboratories using the same published vitrification protocol and you might find one reporting 94% post-thaw survival and another reporting 83%. Same technique, different outcomes. Here is what usually explains the gap. The first variable is whether the laboratory uses a matched kit or sources components separately. Warming solutions from one brand used alongside a vitrification solution from another create osmotic conditions at thaw that differ from those the cells were dehydrated for. The result is cellular stress on rehydration. The second is training rigour. The 60-90 second exposure window during the vitrification step is the most critical interval in the entire process. It cannot be approximated. Laboratories that treat it as a biological constraint -- rather than a rough guideline -- produce consistently higher survival rates. The third is storage infrastructure. A vitrified embryo stored in a vessel with a wide neck, high traffic, and margina...

  If you work in a UK fertility clinic or andrology laboratory, cryogenic equipment maintenance is not optional. It is a documented requirement within the HFEA's regulatory framework, and inspection findings relating to maintenance records are compliance issues that carry real consequences. Liquid Nitrogen Storage Vessels Storage vessels require ongoing performance monitoring even though they have no moving parts. The vacuum insulation layer is what keeps liquid nitrogen at -195.8 degrees C, and it deteriorates over time. The best way to track this deterioration before it becomes critical is to monitor liquid nitrogen consumption against the vessel's rated static evaporation rate. A vessel consuming significantly more than its rated figure is showing signs of vacuum degradation. Frost or condensation on the outer wall is a later-stage indicator that the vacuum has already substantially failed. Every vessel should have a maintenance record from the point of installation ...

This week the XVth International Symposium on Spermatology is running at the University of Birmingham, 29 July to 2 August 2026. Dr Bryan Woodward BSc, MMedSci, PhD, FRCPath, Scientific Director of X&Y Fertility and Fellow of the Royal College of Pathologists, presented poster P32 comparing the SpermScope and Makler against UKNEQAS pre-validated sperm concentration target values. Key results Neither chamber accurate vs UKNEQAS targets (both p less than 0.05). No significant difference between chambers directly (p greater than 0.05). SpermScope R squared 0.77 vs Makler R squared 0.68 against UKNEQAS targets. 72.5 percent of samples within five million per millilitre difference between chambers. Conclusion: The SpermScope could be used instead of the Makler and had a slightly higher correlation to validated target values. Read the full article on Cryolab for the complete methodology, reference list and clinical implications.

The PPE decisions in an IVF laboratory cryogenic work environment are more specific than most lab managers realise when they first encounter them. Here is a straightforward breakdown of what the correct specification looks like for each task category. Gloves: length is the specification that matters Four lengths are available: wrist, mid-arm, elbow and shoulder. The length needed depends entirely on the depth of vessel access involved in the task. Surface handling requires wrist length. Reaching into a working dewar requires mid-arm or elbow length. Accessing the bottom of a deep storage vessel requires elbow or shoulder length. Using wrist-length gloves for deep vessel access leaves the forearm exposed even when the operator believes they are protected. This is the most common PPE specification error in UK IVF cryogenic work. One counterintuitive point worth building into training: cryogenic gloves should be loose-fitting, not tight. A tight glove is harder to remove quickly if li...

Running the consumable supply for an IVF laboratory is one of those jobs that is invisible when it works and catastrophic when it does not. The embryologist does not think about whether the right straw is available until it is not. The HFEA inspector does not ask about your cryogenic markers until one has failed and the sample is unidentifiable. Here is what the decisions actually involve. Straws matter more than most labs realise CBS High Security Straws are the dominant straw format in UK fertility laboratories. The sealed design prevents cross-contamination in liquid phase storage. The colour coding supports patient identification at the individual straw level. The format works for both sperm cryopreservation and vitrification, which means one straw type serves multiple clinical applications — simplifying ordering and reducing training complexity. Vitrification reagents are a matched system Equilibration solution, vitrification solution and warming solution are formulated toget...