What day is the implantation of the embryo?

Quite often, especially young women who learned about their pregnancy, they are interested in the question of what day the process is like embryo implantation into the endometrium. After all, from this moment begins the process of gestation, tk. it is not uncommon to introduce embryo into the uterine wall, which leads to spontaneous abortion. Such a miscarriage in the early term is not uncommon, and according to statistics, more than 5% of cases of fertilization end this way.

Implantation of an embryo?

Before answering this question, let us say a few words about what is meant by the term "implantation" in embryology.

Thus, with this process, the embryo that has formed during the time of movement through the uterine tubes enters the mucous, superficial layer of the uterus. At this time the villi of the fetus penetrate the endometrium of the uterus. In some cases, at this time, the discharge of blood from the vagina can be observed . It is this feature that allows some women to learn about successful implantation. This is especially important when carrying out IVF, when a woman looks forward to the result.

If we talk directly about how many days there is an embryo implantation into the uterine cavity, then it must be said that this process can be observed in 8-14 days from the moment of ovulation.

What is early embryo implantation and on what day does it occur?

Depending on the time of onset of this process, it is customary to allocate early and late implantation.

Thus, early attachment of the embryo to the uterine wall is indicated in cases where this process occurs on the 6-7th day after ovulation. In this case, everything happens as usual: at the site of embryo introduction, the uterine tissue swells, accumulating fluid, and also glycogen and lipids. In embryology this process was called a decidual reaction.

What is meant by the definition of "late embryo implantation" and on what day does it occur?

As a rule, doctors speak about this type of implantation if the introduction of the embryo into the uterine wall occurs later than 19 days after the completion of the ovulatory process. In this case, the process itself has the same features as in the case of early implantation, it just starts a little later.

How is the implantation process going on?

As already mentioned above, implantation is one and critical periods of pregnancy, determining its further development. This is why pregnancy does not always occur after fertilization.

So, after the fusion of male and female sex cells, a zygote is formed, which almost immediately after formation rushes to the fallopian tube. It is not uncommon for the sex cells to occur directly in the fallopian tube, in which case the zygote begins its advance immediately from the tube to the uterine cavity. In part, this fact has an impact on the time of implantation.

During the movement through the fallopian tubes, the zygote is actively divided and transformed into an embryo, which at the blastocyst stage is implanted into the wall of the uterus.

If we talk about how many days the process of embryo implantation lasts, it should be noted that it can take up to 3 days. However, often midwives consider the implantation process to be successfully completed only by the time the placenta is fully formed, i.e. up to 20 weeks of bearing the baby.

Thus, taking into account all the above, it can be concluded that it is very difficult to establish the day of implantation of the embryo to a woman independently. That is why, in order to understand that the gestation process has begun, it is best to undergo ultrasound.