During the test tube baby treatment process, I believe many expectant parents have encountered such difficult choices and entangled problems. Let me briefly explain it here today.
Is there any chance of pregnancy with embryos with poor grade? Of course!
Should embryos with poor grade be given up for transplantation? It depends on whether you have other better embryos!
Can embryos with poor grade be cryopreserved? It depends on how bad the embryo is and whether there are better embryos!
Traditionally, the quality of embryos is still based on growth rate and appearance, whether it is the cleavage stage (the second or third day after egg retrieval), the morula stage (the fourth day after egg retrieval), blastocyst stage The embryos on the fifth and sixth days after egg retrieval can be divided into dozens of embryos, ranging from the top embryos to those that have stopped growing.
sets the day of egg retrieval as day 0. The standard embryo growth rate is as follows, but in fact the growth rate of many embryos is not standard. For example, the embryo on the third day should be 8 cells, but in fact there are more than a dozen cells. It is possible for cells to grow too fast or too slowly. Embryos that grow too fast or too slowly will have poor quality:
The morning of the first day | The afternoon of the first day | The morning of the second day | The morning of the third day | The morning of the fourth day | The morning of the fifth day |
Fertilized egg | 2 cell stage | 4 cell stage | 8 cell stage | mulberry stage | blastocyst stage |
In addition to the growth rate, the morphological appearance of the embryo is also graded.
Except for embryos that have apoptotic, other embryos, even if they appear to be of poor quality, have a chance to become pregnant and even give birth to a healthy baby safely. But of course, the embryos with better speed and appearance quality will be better after transplantation. The better the success rate.
When we have better embryos in our hands, of course we will not choose inferior embryos for transplantation; but when we do not have better embryos in our hands, transplanting embryos with poor quality is a last resort, and transplanting embryos with poor quality is a last resort. There is still a chance for an embryo to become pregnant because the embryo has the ability to repair itself to a considerable extent.
However, embryos with poor quality cannot withstand the pressure of freezing/thawing, such as CC grade blastocysts . As for embryos in the dividing stage, if the number of cells is not a multiple of 2, or there are too many fragments in the embryo, it will be easily damaged during the freezing/thawing process.
statement: The above content was originally created by "Hao Pregnancy, Good Life" and is not allowed to be reproduced without authorization. The relevant views on infertility and in vitro fertilization are for health reference only. Regarding the actual condition of the disease, it is subject to face-to-face discussion with the doctor and cannot replace the face-to-face meeting with the doctor. Diagnosis, please be informed!
