Rapid-i™ kit, part of system for freezing eggs and embryos during IVF

Box for Rapid-i™ kit containing seven Rapid-i™ kits in sealed packaging and one Rapid-i™ kit in open packaging and instruction leaflet, each Rapid-i™ kit contains a Rapid-i™ straw, a Rapid-i™ and a metal rod, used as part of the Vitrolife Rapid-i™ Vitrification System for the cryopreservation of eggs and embryos during in vitro fertilisation (IVF), made in Sweden, 2020-2023

In 2021, 76,000 cycles of IVF were carried out in the UK. Cryopreservation has become an increasingly important part of IVF. Current recommendations mean that fewer embryos are implanted per IVF cycle and often additional viable embryos are frozen for use in future fertility treatment. In 2021, nearly half of all IVF cycles in the UK involved the use of frozen embryos. Egg freezing is also one of the fastest growing fertility treatments in the UK with many people choosing it to increase their fertility options. However, cryopreservation of eggs and embryos also allows for more complicated IVF techniques such as pre-implantation genetic testing, to screen for a range of genetic conditions, and newly developed techniques like mitochondrial donation therapy (MDT) which greatly reduces the risk of mitochondrial disease.

The increase in cryopreservation is partly due to better equipment. These Rapid-i kits, part of the Vitrolife Rapid-i™ Vitrification System for the cryopreservation of eggs and embryos, are used to hold the eggs/embryos which are being frozen. The Rapid-i straw consists of two parts. The Rapid-i itself is the inner rod, which has a tiny opening to hold the eggs/embryos. Once the eggs/embryos have been prepared and loaded on the Rapid-i, this is placed into the outer straw, which can be sealed, making it a closed system. This ensures that the eggs/embryos never come into direct contact with the liquid nitrogen, reducing the risk of contamination and removing the need to sterilise the liquid nitrogen.