Walk into an IVF laboratory and you’ll find a world built on precision. Every droplet, every cell, every single spermatozoon is handled with instruments so refined that a fraction of a millimetre can change an outcome. Yet for all attention given to protocols and culture media, pipettes themselves, workhorses of an embryology bench, rarely get spotlight they deserve.

This article closes that gap. A proper look at full landscape of IVF pipettes, what they do, why they’re named as they are, and why distinctions between them matter.

Cryolab supplies a comprehensive range of micromanipulation and handling pipettes to IVF laboratories across UK and Ireland. If you’re searching under names that aren’t on usual supplier shortlist, this is where it pays to dig deeper.

Micromanipulation Pipettes Glass Instruments

These tools are used under a microscope, mounted on a micromanipulator, and operated with extreme precision. Made from borosilicate glass, pulled and polished to micrometre specifications.

Stripping Pipette (Denuding Pipette)

Before ICSI, an oocyte must be stripped of its cumulus-oophorus cell mass. A stripping, or denuding, pipette performs this step.

Typical inner diameters range from 140–170 µm for initial stripping, with finer pipettes, around 135 µm, used for a final pass. Process relies on repeated aspiration and expulsion, using shear force to remove surrounding cells.

Transfer Pipette and Embryo Handling Pipette

These pipettes are used to move gametes and embryos safely between vessels.

Typically plastic and disposable, available in bore sizes of 170–250 µm, allowing embryos to move freely without damage. “Embryo handling pipette” is a broad term covering routine tasks like washing and positioning.

Piezo ICSI Pipette

Unlike standard ICSI pipettes, a piezo ICSI pipette has a flat, blunt tip. A piezoelectric actuator delivers controlled vibrations to penetrate an oocyte membrane with minimal deformation.

Polar Body Biopsy Pipette

Used to sample a polar body for genetic analysis, with inner diameters of around 20–30 µm. Less common today but still relevant in specific cases.

Blastomere Biopsy Pipette

Used at cleavage stage, day 3, to remove one or two cells for genetic testing. Inner diameter is around 30–40 µm.

Now largely replaced by trophectoderm biopsy but still used in some settings.

Trophectoderm Biopsy Pipette

Used on day 5 to 6 blastocysts to sample trophectoderm cells. Inner diameter typically 25–35 µm.

This is now a dominant biopsy method in UK IVF labs.

TESE Pipette

Used in testicular sperm extraction procedures to identify and collect sperm from tissue samples. Common in andrology labs.

Zona Dissection Pipette (PZD Pipette)

Used for mechanical assisted hatching by cutting zona pellucida. Largely replaced by laser methods but still used in some labs.

AHA Pipette (Acid Assisted Hatching)

Delivers a controlled microvolume of acid to dissolve part of zona pellucida. Requires precision and rapid handling. Also largely replaced by laser systems.

General Laboratory Pipettes Used in IVF

Not all pipettes are micromanipulation tools. Standard lab pipettes play a key role across IVF workflows.

Pasteur Pipette (IVF Certified)

Used in sperm preparation to aspirate specific layers. Must be tested for embryotoxicity.

Serological Pipette

Used for larger volume transfers, 1–50 mL, typically in media preparation and reagent handling.

Micropipette (Adjustable Volume)

Used for precise liquid handling, 0.1 µL to 1000 µL. Requires calibration and certified low retention tips.

Volumetric Pipette

Fixed volume pipette used mainly in calibration and solution preparation.

Same pipette can appear under different names depending on source. This creates confusion when sourcing equipment. Cryolab’s range covers full spectrum of IVF pipettes, from ICSI and biopsy micropipettes to denudation and holding pipettes. If you’re working from varied terminology, Cryolab team can match specifications to correct instrument. Contact Cryolab at info@cryolab.co.uk or visit cryolab.co.uk to discuss your laboratory requirements.