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Egg Sperm Freezing

Similarly,Egg frozen sperm can be used for later treatment or for donation. The standard duration of storing the sperm is around 10 years, however before the treatment the donated sperm has to be stored for six months. Males who have low sperm count, a medical condition that shows infertility may occur in later life, have gone through medical treatment that may affect their fertility, and those who are about to undergo a vasectomy, can elect to store their sperms

Sperm freezing is the established way to preserve male fertility and the process is similar to embryo freezing. Same screening tests will be done to test the quality of the sperm and to confirm the sperm is free from any kind of genetic disease.

The success rate of pregnancy using the frozen sperm is dependant on careful sperm selection and preparation, as sperms can get damaged during the storage process.

Embryo freezing

 

Embryo freezing is relatively a new technique which is used as a part of the IVF treatment. Embryo freezing offers the opportunity for couples to conceive more than once from a single IVF procedure. During the IVF procedure, fertility drugs are recommended by doctors to stimulate the production of eggs. This usually results in more eggs than requried. A couple can choose to store their embryos for future use, should they decide to concieve again without going through the ovum pick up, and In Vitro Fertilization steps of the process. If they later decide not to use the embryos, they may elect to donate them to other couples.

The process of embryo freezing is very simple. The unused embryos are frozen and stored in the tank of liquid nitrogen at -196 degrees Celsius. During the freezing process, a liquid called cryoprotectant is added to protect the embryos. It is not necessary that all embryos will survive the thawing process. Therefore, for the next cycle, your doctor will advise you to have more embryos thawed than need to be transferred.

Another method used for the same is Vitrification. This technique uses very much high concentrations of cryoprotectant, usually three or four times higher. Rapid cooling is used to freeze the embryos around 10,000 times faster to prevent the toxicity of the high levels of cryoprotectant and to achieve vitrification. Vitrification, in simple words, is a process of changing the liquid state into gas formation instead of changing it into solid state that allows cells to be preserved into its existing state.

Normally, embryos can be stored for ten years and after this its storage will depend on the women's medical circumstances and her partner or sperm donor's medical status.

The success rate of pregnancy using the frozen embryos is similar or slightly lower than that following the fresh embryos.