CPT® Code 89337

Cryopreservation, specifically the process of preserving mature oocytes, is a technique utilized to maintain or enhance the reproductive potential of women who may face risks of primary ovarian insufficiency or failure. This procedure is particularly relevant for women undergoing treatments that could compromise their ovarian function, such as chemotherapy or pelvic radiotherapy, often associated with cancer or other significant medical conditions. Additionally, it is applicable to women with specific genetic or chromosomal abnormalities, including fragile X permutation and mosaicism for monosomy X, which may predispose them to reproductive challenges. The process involves the retrieval of mature oocytes following a superovulation protocol, where hormonal treatments stimulate the ovaries to produce multiple eggs. Once retrieved, these oocytes are immersed in a concentrated cryopreservative solution, which may include substances like glycerol, propanediol, ethylene glycol, or dimethyl sulfate. This immersion is crucial for protecting the oocytes during the freezing process. Subsequently, the oocytes undergo a rapid cooling technique known as vitrification, utilizing liquid nitrogen to solidify the cells quickly. This method effectively halts all biological activity, thereby preserving the oocytes for potential future use in assisted reproductive technologies.