What is the embryo doing the day after transplantation?

The basic principle of in vitro fertilization is to take the egg cells from the woman's body and the male sperm from the man's body, put them in a container and culture them together. After the test tube embryo is produced, the test tube is transplanted into the woman's uterus. We must understand that the test tube embryo transplanted into the woman's uterus only means that the test tube baby is half done, and it does not mean that the woman is pregnant. To make sure that the woman is pregnant, the test tube embryo must successfully implant.

So what are the test tube embryos doing on the second day of transplantation? We all know that there are two types of test tube embryos cultured through in vitro fertilization: fresh embryos and embryos. Fresh embryos are sperm and eggs combined and cultured in a container for three days; while embryos are sperm and eggs combined and cultured in a container for five days. Embryos are the new upgrade of fresh embryos. In other words, unless something unexpected happens, fresh embryos will eventually produce embryos, and this process is a normal natural law.

It is not easy for fresh embryos to implant immediately after being transplanted into a woman's body. Generally, it takes two days for the embryos to implant. However, ES embryos are different from fresh embryos. They can implant on the day they are transplanted into a woman's body. Fresh embryos often begin to implant two days later than embryos because they need to grow and develop first to produce embryos. In other words, embryos are produced during the test tube embryo development period on the second day after fresh embryo transfer, and the test tube embryos are already implanted on the second day after embryo transfer.

In other words, after the test tube is transplanted into the woman's body, the embryo can implant immediately if needed. However, even if the test tube embryo has already begun to implant, it will take about 7 days for the embryo to implant successfully. In other words, the entire process of fertilized egg implantation is actually looking for a suitable point for the embryo to implant. We need to understand that test tube embryos are scattered throughout the entire process of embryo implantation. The second day after fresh embryo transplantation is not yet a dispersion situation because embryos need to be produced first. By the second day of embryo transfer, embryo implantation had already begun and was in a diffuse state.

We first need to make it clear whether it is fresh embryo transfer or embryo transfer. If it is fresh embryo transfer, then on the second day after transplantation, the fresh embryo has not yet implanted and is still growing and developing into an embryo. If it is embryo transfer, then on the second day of transfer, the test tube embryo has already begun to implant and is looking for a suitable point for embryo implantation in the uterus. Because there are not many suitable spots for embryo implantation, it takes about 7 days for the test tube embryo to implant successfully.