The consumables in an IVF laboratory are not background noise. They are the materials that directly touch patient samples at every stage of the cryogenic workflow – from the straw a sperm sample is frozen in, to the goblet that holds it in a dewar, to the marker that identifies it. Choosing the right consumables and maintaining a reliable supply is not a purchasing convenience. It is a clinical and regulatory requirement.

This guide covers the core consumable categories UK IVF laboratories need, what to look for in each, and where the supply chain decisions that seem minor can turn out to matter most.

What counts as an IVF laboratory consumable?

The term consumable covers any item used in the course of laboratory work that needs to be replaced. In an IVF or embryology laboratory, this spans a wide range of products – some used daily in large quantities, some used rarely but critical when needed.

The main consumable categories for UK IVF labs are cryogenic straws and carrier devices for embryo, oocyte and sperm storage; vitrification and warming reagent kits; storage organisation consumables including goblets, canisters, cryocanes and visotubes; cryogenic markers and labelling products; sperm analysis equipment including counting chambers; pipettes for micromanipulation procedures; and safety consumables including cryogenic gloves, face shields and aprons.

Each category has specific selection criteria, and getting them wrong creates problems that range from operational inconvenience to HFEA compliance issues.

Straws: the most used consumable in any IVF lab

The CBS High Security Straw system is the most widely used straw platform across UK IVF and andrology laboratories. The reason comes down to two things: the sealed design that prevents exchange between the straw interior and the surrounding liquid nitrogen, and the consistent format that works for both sperm cryopreservation and as a carrier in closed-system vitrification.

UK labs that have standardised on CBS straws report a meaningful reduction in consumable management complexity. One straw system, one sealer, one training protocol. When staff handle the same format across multiple applications, errors decrease and traceability documentation becomes more consistent.

The 0.3ml and 0.5ml formats serve different volume requirements. For sperm cryopreservation, the 0.5ml straw is standard in most UK andrology units. For closed-system vitrification, the 0.3ml is the more common choice. Your choice needs to be confirmed as compatible with your sealing equipment before ordering at scale – a sealer calibrated for one wall thickness may not create a reliable seal on a different format.

Vitrification kits: reagents are not interchangeable

A vitrification kit is a matched system. The equilibration solution, the vitrification solution and the warming solutions are formulated to work together at specific concentrations and exposure times. Mixing reagents from different manufacturers is not recommended and in a licensed clinical setting should not happen without full protocol validation.

The CBS High Security Vitrification Kits supply the complete reagent set needed for the closed-system vitrification workflow, from equilibration through to warming, in a single validated supply. For UK labs that want consistency across their consumable supply, using the same CBS system for both straws and vitrification kits removes one source of potential protocol variation.

Shelf life and cold chain integrity during delivery matter here. Vitrification reagents are temperature sensitive. A supplier who cannot guarantee correct storage and delivery conditions is a risk in a clinical protocol that tolerates very little variation.

Storage organisation: the consumables that make inventory manageable

Visotubes, cryocanes, goblets and canisters are the organisational infrastructure of your liquid nitrogen storage vessel. Under HFEA requirements, every sample in storage must be positively identifiable at any point during its storage period. These consumables are how that traceability is maintained in practice.

Visotubes are available in multiple cross-sectional shapes – round, hexagonal, triangular and polygonal. The shape determines how tightly visotubes pack within a goblet, which directly affects the total sample capacity of your vessel configuration. For labs trying to maximise capacity within a fixed vessel size, this is not a trivial consideration.

Colour coding at the visotube, goblet and cryocane level is the primary visual identification system most UK labs use. The colour scheme must be consistently applied and documented in laboratory procedures. When colour assignments change between consumable batches – which can happen when ordering from multiple suppliers or switching brands – traceability audits become complicated. Ordering a consistent colour scheme from a single supplier removes this variable.

Cryogenic markers: the consumable that fails silently

Standard permanent markers fail in liquid nitrogen storage. The inks are not formulated for -195.8 degrees C and the resulting labels crack, fade or detach over time, often without being noticed until a retrieval event makes the failure visible.

In an HFEA-regulated setting, a label failure is a traceability failure. The question is not whether this will happen with standard markers – it is when it will be discovered and what state the label will be in when it is.

Cryolab supplies cryogenic markers formulated specifically for cryogenic storage conditions. The ink adhesion is tested at liquid nitrogen temperatures and through the thermal cycling that occurs each time a sample is retrieved and returned to storage.

Counting chambers: the andrology consumable decision

UK andrology laboratories typically use either reusable counting chambers or single-use disposable chambers for sperm concentration and motility assessment. Both approaches work reliably. The decision comes down to throughput, cleaning burden and protocol validation preferences.

The SpermScope reusable cell analysis chamber is designed for accurate sperm assessment with the repeat-use economics that suit labs managing consistent volume. The Proiser disposable counting chambers offer zero cross-contamination risk per sample and eliminate the cleaning and validation burden between patients.

Any change to counting chamber format in a validated andrology protocol requires validation against your existing reference data before clinical adoption. This is not a consumable switch that should happen informally.

Pipettes: precision consumables that require exact specification

Denudation pipettes, holding pipettes and biopsy pipettes are precision instruments used in micromanipulation procedures. The inner bore diameter, tip geometry and material determine compatibility with your microscope system and your clinical protocols.

Cryolab’s pipette range covers denudation, holding and biopsy configurations. When specifying pipettes for a new protocol or replacing an existing supply, confirm the bore diameter and tip configuration against your current validated protocol before ordering at scale. Switching pipette format without validation is a protocol change, not simply a consumable swap.

Supply chain reliability: the variable labs underestimate

The most technically correct consumable in the wrong quantity at the wrong time causes exactly the same clinical problem as a poor-quality product. UK IVF laboratories that manage consumable ordering on a purely ad hoc basis will at some point face a situation where the right straw, reagent or marker is not available when it is needed.

The practical approach is to establish a regular ordering pattern with a primary supplier who holds sufficient stock of your core consumables, and to maintain a buffer supply of the items that are most operationally critical. For most UK IVF labs, that means straws, vitrification reagents and visotubes in the first instance.

Cryolab supplies the full range of consumables used across UK IVF and andrology laboratories. Contact the team to discuss your regular supply requirements, or use CryoGPT for immediate guidance on product selection and compatibility.