IVF: embryo development after embryotransphere

 

Embryo implantation into uterine cavity is carried out under ultrasound control when patient lies on gynecological chair. A special silicone catheter is introduced into the cervical canal, through which the embryo (or several embryos) is transported to the uterus.

The procedure takes 10-20 minutes, is completely painless, does not cause discomfort, so it does not need pain relief. In extremely rare cases, light anesthesia is carried out. The embryotransfer at the blastocyst stage allows you to choose the best quality embryos, which significantly increases the chances of a successful pregnancy. Transfer of five-day embryos is indicated when more than 5 qualitative zygotes were formed and in cases where a previous attempt at in vitro fertilization was unsuccessful.

Development of five-day embryos after embryotransphere:

The first day. The embryo leaves the blastocyst, growth continues. There is a division of cells into 2 types: internal (trophoblast) - a placenta forms from them, and external - organs form from them.

The second day. Injection into the endometrium begins.

The third or fifth day. Trophoblast villi deepen into the endometrioid layer. From it, the embryo receives nutrients, oxygen, takes out life products. The genomic set is determined.

The sixth day. A substance that dissolves tissues is released, due to which the embryo deepens into the uterus. The depression leads to blood filling the space between the villi of the trophoblast. On this day, bloody discharge is possible.

The seventh or tenth day. There is a final introduction into the endometrium, epithelium coverage, the beginning of placental formation.

When the embryo is implanted into the uterine membrane, HCG will appear in the blood of the future mother, by the level of which the onset of pregnancy is judged. Hormone growth is observed 10-14 days after embryo transfer. Then it will be possible to do a home test, donate blood for chorionic gonadotropin, do ultrasonography for the presence of a fruiting egg.

If these indicators are normal, then pregnancy has come.

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