It is a process that involves using cryoprotection to preserve female reproductive cells, namely egg, so that they can be fertilized with sperm outside the body.
Egg freezing or egg bank
Egg freezing or Oocyte Cryopreservation is a process that involves using cold to preserve female reproductive cells, which are eggs, for fertilization with sperm outside the body using assisted reproductive technology at the appropriate time.
The process of egg freezing or egg donation is as follows:
- Ovarian stimulation
begins with an ultrasound scan through the vagina and a blood test to check the number of eggs. Then, an injection of medication is given to stimulate the eggs for about 9 to 12 days. The amount of medication will vary depending on the function of the ovaries. When the ultrasound shows that the size and number of eggs are as desired by the doctor, an injection will be given to mature the eggs. - Vaginal egg retrieval
is a procedure performed under ultrasound and using a needle to aspirate the eggs from the egg sac. It is a minor procedure performed under intravenous anesthesia by an anesthesiologist. The patient must abstain from food and water for at least 8 hours before egg retrieval, which takes approximately 30 to 45 minutes, depending on the number of eggs. - Egg freezing,
where scientists select perfect eggs to freeze by rapidly reducing the temperature to prevent ice crystals from forming that can damage the egg cells. When frozen eggs are needed, scientists thaw them and return them to body temperature following laboratory techniques, including checking and evaluating the eggs’ health before fertilizing them with sperm to form embryos and transferring them into the uterus to achieve pregnancy.
Currently, research has found that to have one child, it is necessary to have at least 8 to 10 good quality frozen eggs for service recipients under the age of 35 .
The success depends on the quantity and quality of eggs at the time of egg freezing. แทงบอล UFABET ราคาดีที่สุด ไม่มีขั้นต่ำ The younger the age, the higher the chance of success.
Advantages of Egg Freezing or Egg Banking
- Suitable for women who want to freeze their eggs for fertilization with their husband’s sperm when they are ready to have children in the future.
- For women who want to freeze their eggs before chemotherapy or radiation therapy that could harm their ovaries.
- For those with genetic problems that cause the ovaries to deteriorate quickly or those with problems with ovarian function, such as chocolate cysts.
- Used in cases of infertility treatment using IVF, but the male partner is unable to ejaculate or has no sperm on the day the female partner collects eggs, so the eggs can be frozen for storage first.
- Used for freezing eggs for donation.
Successful Pregnancy from Frozen Eggs
Success depends on the age, as well as the quantity and quality of the basic eggs. Generally, frozen eggs have a survival rate after thawing of about 80 – 90 percent. When entering the fertilization process with sperm, the fertilization rate is found to be 70 – 80 percent. After fertilization, the embryos are cultured for another 5 days to obtain blastocyst-stage embryos suitable for implantation. The chance of obtaining a blastocyst-stage embryo is about 60 percent.