Consultation: In the last week, I transplanted a blastocyst, the grade felt good, and on the fifth day of the transplant, I began to test, but it was always a whiteboard, there was no sign of pregnancy, I was still worried about whether it was failure, and as a result, the sisters in our group all said that they would have to wait until about 12 days to have results, is this true? Will it take 12 days for the blastocyst to be transplanted to be effective?
Fertility: Blastocysts are generally embryos that have been fertilized in vitro for 4-6 days, with good developmental potential and relatively short implantation time. A single blastocyst can be measured in about 7 days after transplantation, generally 12-14 days can be detected by blood test human chorionic gonadotropin (HCG), and the early pregnancy test strip is slightly later than the blood test 1-2 days.
In the case of normal natural conception, when the trophoblast of the fertilized egg is formed (on the 6th day after fertilization), a trace amount of HCG begins to be secreted, which can be detected in the maternal blood about 10 days after fertilization, and the serum HCG level rises from 5 IU/L to 50 IU/L within 1 week of the implantation of the fertilized egg in the inner membrane, at which time the blood test will be more accurate. Blastocyst transfer has been fertilized for 4-6 days of fertilized eggs, so it can generally be measured about 7 days after transplantation, but because each person's transplanted blastocyst grade is different, and there are differences in physical fitness, so the embryo implantation time will also be different, most of which can be measured 12-14 days after blastocyst transfer.
So how many days can the transplant blastocyst be measured?
We all know that if you want to quickly detect whether a woman's body is pregnant, then you can only pass the hcg blood test. But even if it is a hcg blood test, it takes more than 7 days for the embryo to successfully implant before it can be detected from the blood. Although the blastocyst transfer can start implantation on the same day, it does not mean that the implantation of blastocysts will be successful on the same day.
Under normal circumstances, embryos are transferred into a woman's uterus for about 7 days, in order to find a suitable implantation point. If the embryo cannot find a suitable implantation point, then the embryo may fail to implant. In fact, the success or failure of embryo implantation has a lot to do with the quality of the embryo. If the embryo quality is good enough, it is possible that the embryo will implant successfully on the day of the blastocyst transfer. Of course, this situation is still relatively rare.
That is to say, the transplant blastocyst can be measured as soon as day 7, but this requires that the quality of the blastocyst is good enough. Usually, embryo transfers take at least the 14th day to pass a blood test. The probability of being able to detect the blood on the 7th day of transplantation is still relatively low, but it does not mean that there is none. So the advantage of IVF is that the success rate of transferring the best quality embryos into women's bodies will be much higher.
So the first few days of transplanted blastocysts can be measured? The answer is indeterminate. In general, it takes the 14th day for the transfer of embryos to be tested in the blood. If the blastocyst quality is good enough to start implantation on the day of transplantation, and implantation can be successful on the day of implantation, then it is possible to be tested from the blood on day 7 of transplantation. In other words, pregnancy can be detected as soon as day 7 of the transplant blastocyst.
After embryo transfer, you should relax your mind, eat less spicy and stimulating foods, and strictly follow the doctor's instructions. 12-14 days after transplantation, pregnancy testing, to avoid premature testing caused by unsatisfactory results, causing anxiety, nervousness and other adverse effects. If there is abdominal pain or bleeding during this period, it is necessary to see a doctor in time.