Where do embryos go after a failed implantation?

In life, many people have relatively weak fertility. For some infertile patients, the main clinical method is to use test tube babies to satisfy people's desire for children. However, test tube babies are not 100% successful and there are also certain risks. Moreover, the success rate of in vitro fertilization is relatively low, and failures often occur. So where do the embryos go after a failed IVF transfer?

1. After the transplantation fails, the embryo is absorbed by the body, or is expelled from the body with the menstrual period. After the embryo is transplanted, it will first wander in the uterine cavity. If the embryo transplanted is a 3rd day embryo, it will absorb nutrients and continue to divide. After developing into a blastocyst, it will look for a suitable position for implantation in the uterine cavity. If the endometrial environment is not suitable for implantation, the embryos will migrate outside the uterus. If they implant in the fallopian tube, an ectopic pregnancy will occur. After the embryo finds a suitable position in the uterine cavity, it adheres to the endometrium and then penetrates the endometrium and implants successfully. If this process fails, it will be absorbed by the body or excreted with menstruation.

2. After the failure of IVF transplantation, the embryo will flow out with the body's metabolism without a big reaction. However, due to the physical constitution of some patients, abdominal pain and bleeding may occur. These are normal reactions. If you are worried about your health, you can go to the hospital for a check-up in time. In vitro fertilization clinics have found that in cases of repeated IVF failure, the proportion of embryo chromosomal abnormalities is as high as 60%. Therefore, many embryos implanted in the uterus fail to implant because of chromosomal abnormalities in the embryo itself.

3. If the embryo fails to implant, it will definitely be expelled from the body. However, there are two ways to be expelled from the body: either it is expelled from the body along with the excrement, or it is expelled from the body along with the menstruation. Since the embryo does not pass through the digestive system, it is impossible for a failed embryo to be excreted from the body along with the feces. The only possibility left is that the embryo that failed to implant will be excreted from the body along with the menstrual fluid during the menstrual period.