Each sister who does test tubes after experiencing the difficulties of downregulation and ovulation induction, successful to get eggs, at this time to get more eggs of the sisters will be very happy, because the number of advantages will make the probability of matching embryos greatly improved, when the doctor called to inform the number of successful embryos is even more ecstatic, but at this time some sisters will also be because of too many embryos and lead to sweet burdens, and fall into deep doubts.
Why is this happening?
Because of the sisters with more embryos, the doctor will recommend direct fresh embryo transfer or embryo freezing (frozen embryo) and sac (embryo culture in the laboratory)
Fresh embryo: After the egg and sperm are combined in the environment created by the laboratory, the egg is split to form a small cell ball, which is called the early embryo at three days, after the embryo rating, if conditions permit, the fresh embryo can be put into the uterine cavity on the day we go to see the embryo, called fresh embryo transfer, and the embryo at this time is also called fresh embryo.
Frozen embryos: Because there are more embryos when we generally transfer 1-2, the rest of the fresh available embryos can be stored in a fast-frozen manner, the embryos are placed in the cryo-liquid, and the temperature is quickly reduced by about -190 ° C, so as to avoid the formation of ice crystals in the embryos and cause embryo damage. At present, the domestic embryo freezing technology is relatively perfect, and there are few cases of embryo damage caused by improper freezing.
Blastocysts: Patients with more embryos will recommend raising sacs, raising sacs is to cultivate blastocysts, put the fresh embryos for 3 days in a suitable environment created by the laboratory, let the 3-day fresh embryos develop on their own for 2 days, and the cells divide again until the space between the cells forms a large vacuole, similar to the mole, and the embryo at this time is called the blastocyst. Generally speaking, because the blastocyst is free in the uterine cavity after transplantation, the implantation rate of the blastocyst is better than that of the fresh embryo, but because the in vitro culture of the embryo has very high requirements for environmental biochemical conditions, there is a certain difference between the environment simulated by the laboratory and the real in vivo environment, so the sac has a certain loss rate, which is commonly speaking, it may lead to the embryo being raised and died. Therefore, in general, only patients with more embryos will be recommended by doctors.