As we all know, the probability of successful blastocyst transplantation is relatively large, but sacing is not suitable for everyone. Different people raise sacs also depending on the situation, if they are not suitable for raising sacs, they are also white, and the probability of success of the transplantation of fresh embryos is not as good as that of a better one.
Hengjian Overseas pointed out that although there are many benefits to raising sacs, we must know that sacs also need to have certain conditions:
1. Younger than 35 years old, good response to yao material excretion, the number of eggs retrieved is about 12-15, and there are more than 5-8 high-quality cell stage embryos, you can choose to raise sacs.
2. Women who need to do embryo biopsy can choose to raise a sac in order to wait for the result of PGD.
3. The embryo quality is better, but for unknown reasons, it has failed many implantations (more than 3 times), and it is suspected that it is a woman with limited embryonic development potential, and she can choose to raise a sac.
What is the TEST-tube sacing process?
During natural conception, embryos cultured to day 3 are still in the fallopian tubes, and if the third day embryos are implanted into the uterus, the embryos may not be able to adapt in a different environment from the fallopian tubes. The blastocysts cultured to the fifth day are very adaptable just before reaching the uterus from the fallopian tubes during natural conception.
IVF and naturally conceived embryos are formed by combining eggs with sperm, which are the cells of the baby's primordial vein, also known as fertilized eggs. Embryos and blastocysts in the cleavage stage are different stages of embryonic development, the fertilized egg grows to 3 days to divide into 8 cells, called the embryo of the cleft stage, and grows to 5-6 days called the blastocyst, which is composed of the inner cell mass and the blastocyst cavity and the nourishing ectoderm.
IVF cao is usually selected for 1-2 embryos in the fissure stage for transfer, but the potential for embryos to continue to develop at this stage is difficult to predict. If culture continues, embryos with good potential will form blastocysts, and a considerable number of embryos will stop developing and be abandoned due to poor development potential.
Blastocysts are the final stage of in vitro culture of embryos, and compared with embryos at the fission stage, blastocysts are more mature and more suitable for growing in the uterine environment, so blastocyst transfer can obtain a higher embryo implantation rate.
Reasons why blastocyst transfer is more successful than general embryo transfer - the rate is high:
1, can ensure the development potential of the embryo: whether the embryo can smoothly develop to the blastocyst stage is closely related to its own basis - cause, growth capacity, if the embryo does not have development potential or chromosomes, basis - cause abnormalities, it can not develop to the blastocyst stage, that is to say, the embryo quality that can develop to the blastocyst stage is usually better than other embryos, so the success rate of blastocyst transfer is also relatively high.
2. Embryonic development and endometrium are more synchronized: during the blastocyst stage transfer stage, the endometrial environment can provide a natural environment closer to reproductive physiology, so the implantation rate will be relatively high.
3. Reduce the risk of multiple pregnancies: Because the success rate of blastocyst transfer is high, the number of embryo transfers can be relatively reduced, and the occurrence of multiple pregnancies can be effectively reduced.