At Fertility CARE, embryos can be cryopreserved anywhere from the 2PN stage (24 hours after fertilization) to the blastocyst stage (day 5-6). They are frozen in labeled straws with a plastic topper that is also labeled with the patient’s name, birth date, date of retrieval and the stage of the frozen embryos.
The straws are heat sealed and placed in a plastic tube on an aluminum cane that is kept in liquid nitrogen. They are kept at -196°C and the levels of the liquid nitrogen are checked each day. Although they can be kept in this environment permanently, it is up to the patient to decide the disposition of embryos in the future.
Embryo Cryopreservation is similar to IVF. It is a minimally invasive, in-office procedure.