Where to transfer unimplanted embryos?

We all know that women can get pregnant not only through sexual intercourse between men and women. Today's scientific research is more advanced, and even if men and women do not have sexual intercourse, they can still get pregnant. In vitro fertilization does not require sexual intercourse between men and women. It only requires taking the egg cells from the woman's body and the male sperm from the man's body and cultivating them together. Before the test tube embryo is cultivated, all the operations are carried out outside the woman's body. Only when the test tube embryo is cultivated will it be transplanted into the woman's uterus. After the test tube is transplanted into the woman's uterus, the embryo will be prepared for implantation.

So where do the failed test tube embryos go? We all know that the success rate of in vitro fertilization is only 20%. The success of in vitro fertilization is only considered successful when the test tube embryos are successfully implanted. In other words, there is a high possibility that the test tube embryos will fail during the process of embryo implantation. The test tube embryos cultured through in vitro fertilization are divided into fresh embryos, embryos and frozen embryos. After these three types of test tubes are transplanted into women's bodies, the time when the test tube embryos begin to implant is different.

However, no matter which test tube transplantation is used, embryo implantation requires a process, which usually takes about 7 days for successful implantation. In other words, 7 days after the test tube transplant, either the embryo implants successfully or is absorbed by the body in a certain area and cannot implant. In fact, if the embryo fails to implant, the test tube embryo will be expelled from the body along with the menstrual period. Women who have done in vitro fertilization can pay attention to their menstrual period.

In fact, we all know that whether it is in vitro fertilization or normal pregnancy, when the sperm and egg combine to form sperm and egg, the sperm and egg combination must be successfully implanted to be considered pregnant. If the sperm and egg combination fails during the embryo implantation process, then it cannot be considered pregnant. Women who are not pregnant will have normal menstruation. Even if the menstruation is delayed, it does not necessarily mean pregnancy. A delay of menstruation within 7 days is considered normal. If the embryo implantation fails, it will be discharged along with the menstrual period.

So, where does the test tube embryo go if the transplant fails? We all know that if the fertilized egg fails to implant, it will definitely be excreted from the body, but there are two ways to be excreted from the body, either it is excreted from the body along with feces, or it is excreted from the body along with menstruation. Because the test tube embryo does not pass through the digestive tract, it is impossible for the test tube embryo to be excreted from the body with feces if the test tube embryo fails to implant. Then there is only one possibility, that is, the test tube embryo with unsuccessful embryo implantation will be excreted from the body together with the menstrual period.