Type 1 (S-CS-T1)– Flat Loading Area
The loading tip is flattened, creating a broad, thin surface.
The specimen (oocyte/embryo/sperm aliquot) rests in a shallow, flat channel.
Typically offers faster heat exchange because the sample layer is thin and spread wider.
 
Advantages
Rapid thermal transfer → excellent for vitrification and ultra-rapid cooling/warming.
Easy visualization of embryos or oocytes due to the open, flat geometry.
Ideal for consistent minimal-volume loading (very thin droplet).
Many embryologists find it easier for quick, repeatable handling, especially in high-volume labs.
 
Best Uses
Oocyte vitrification (when fastest cooling and minimal volume are critical).
Embryo vitrification for blastocysts or cleavage-stage embryos.
Labs that prefer maximum cooling/warming rates and thin sample layers.
Embryologists with strong pipetting precision who prefer an open platform.
 
Type 3 (S-CS-T3) – U-Shaped Loading Area
The loading tip is shaped like a U-channel, forming a slightly deeper groove.
The specimen settles into the center of the curved area, giving more “containment.”
Slightly slower heat exchange than a flat design, but offers higher physical protection to the sample.
 
Advantages
Better sample containment → reduces the chance of droplet displacement during loading.
Curved channel protects the specimen, especially when moving between media.
Helps maintain consistent droplet shape in the center of the groove.
More forgiving for new embryologists or labs with varied levels of experience.
 
Best Uses
Sperm freezing (aliquots stay centered in the groove).
Embryo or oocyte vitrification when the embryologist prefers more physical guidance for the droplet.
Clinics training new staff who benefit from greater loading stability.
Situations where the specimen must be held in a secure, centralized spot during handling.