Egg freezing is a cutting-edge technology in the field of assisted reproduction, which means that the eggs are taken from the mother when she is healthy and frozen to prevent them from aging with the human body, and then the frozen eggs can be taken out and used when one wants to have a baby. Sperm freezing and embryo freezing are relatively mature in clinical application, while egg freezing is much more difficult than other tissue cell freezing and recovery techniques. As eggs are very sensitive to temperature, freezing may cause damage to the fine structure and chromosomes of eggs, and frozen eggs are far less active than fresh eggs, so the chance of clinical fertilization is lower than that of fresh eggs. Who can choose egg freezing at present? Married women are generally eligible for egg freezing by qualified hospitals under two circumstances. One is the infertile woman on the day of egg retrieval, the male partner can not provide sperm in time, at the same time refused to provide sperm for IVF; the second is the woman suffering from malignant tumors, in the whole body of a larger dose of radiotherapy before, can be taken out of the eggs frozen, to save the opportunity to have offspring. Egg freezing technology can provide hope for those young infertile patients who need to have their ovaries removed and undergo radiotherapy to preserve their fertility; it can also be used to establish a “human egg bank” to provide eggs for women with fewer eggs, no eggs, and premature ovarian failure, etc.; and it can also solve the thorny problems encountered in many ethical, legal, and moral aspects of embryo freezing; and further promote the development of biology, biology, and biology, as well as the development and application of embryonic technology. It can also solve many ethical, legal and moral problems encountered due to embryo freezing, and further promote the development of biology, genetics, histology and other aspects. Since there are only more than 100 egg-freezing babies in the world, all of whom are less than 10 years old, and there is a lack of long-term observation on whether they will be affected by egg freezing in the future, this technology has not yet been fully verified. As you can see, egg freezing is for a rainy day, and ordinary people should not try it casually.