It is a medical procedure used in assisted reproductive technology (ART) to preserve embryos for future use, known as embryo freezing or embryo cryopreservation. As a result of in vitro fertilization (IVF) or other fertility treatments, embryos are frozen and stored. Individuals or couples can freeze embryos for use in fertility treatment cycles, such as embryo transfer or embryo donation, in the future.
Before undergoing embryo freezing:
Fertility medications are typically used to stimulate the ovaries to produce multiple eggs through ovarian stimulation.
Transvaginal ultrasound-guided egg retrieval is a minor surgical procedure for retrieving eggs from the ovaries.
In the laboratory, the retrieved eggs are fertilized with sperm to create embryos.
Before embryos are frozen, they are monitored and evaluated for quality and development.
The embryo freezing process involves several steps:
To allow embryos to develop, they are cultured in the laboratory for several days after fertilization.
Embryos are protected from damage during freezing and thawing by cryoprotectant solutions.
The embryos are then rapidly cooled to very low temperatures using a process called vitrification, which prevents ice crystals from forming.
Embryos are stored in cryogenic containers filled with liquid nitrogen at temperatures below -196°C (-321°F) once vitrified.
After embryo freezing:
In preparation for future embryo transfer cycles, patients may undergo regular monitoring to assess hormone levels and endometrial thickness.
For individuals or couples undergoing fertility treatment, embryo freezing can be emotionally challenging. Counseling or support groups can help.
Embryo freezing is generally considered safe, but there are some risks and considerations to keep in mind:
Embryo loss is a small risk during freezing and thawing.
Despite stringent storage protocols, there is a minimal risk of storage tank failure or malfunction, which could result in the loss of stored embryos.
Frozen embryos may raise ethical or moral concerns for some individuals or couples.
After embryo freezing, individuals or couples may consider the following:
Maintain regular communication with the fertility clinic regarding embryo storage, including storage fees, storage duration, and any necessary paperwork.
Plan your future treatment options with your fertility specialist, such as embryo transfer, embryo donation, or disposal of stored embryos.
Consider legal agreements regarding the disposition of embryos in case of divorce, death, or other unforeseen circumstances.
By freezing embryos, individuals or couples are able to preserve their fertility and increase their chances of becoming pregnant in the future. Individuals can make informed decisions regarding embryo freezing as part of their fertility treatment journey by understanding the process, risks, and aftercare considerations.
