Attaching the embryo to the uterus

From the moment of ovulation, the egg moves from the ovarian follicle, from where it came out, to the uterine cavity. In the place where the egg leaves the ovary, a yellow body remains, which provides the preparation of the endometrium of the uterus for the second phase of the cycle and the attachment of a fertilized egg. And with the onset of pregnancy, it produces progesterone, which is necessary until 16 weeks of pregnancy, until the function of the yellow body takes on the placenta.

And the egg passes through the abdominal cavity, is captured by the fimbria of the uterine tube and moves along its lumen into the uterus. In the lower part of the tube, it can meet the spermatozoon, fertilization occurs with the formation of a zygote.

For several days the zygote is divided, and the blastocyst, which has two types of cells, gets to the uterus on day 6 after conception.

The inner layer of cells or the embryoblast is the one from which the embryo will be formed, and the outer layer is the trophoblast that will give rise to the membranes and placenta. It is he who will be responsible for attaching the embryo to the uterine cavity.

Attributes of embryo attachment to the uterus

Endometrium of the uterus at the onset of pregnancy is ready to attach the blastocysts - it accumulates lipids and glycogen, slowing its progress. The average term of embryo attachment to the uterus is 8-14 days from the onset of ovulation. At the point of attachment, the endometrium becomes edematous locally and is damaged by the trophoblast imploding into it (a decidual reaction occurs). Because of this damage, even decidual bleeding is possible. Therefore, when the embryo is attached to the uterus, discharge can be bloody and smearing, blood appears in a small amount. But with any bloody discharge during pregnancy, confirmed by the test, you need to turn to a gynecologist.

Other possible symptoms of embryo attachment to the uterus are small pulling pains in the lower abdomen, an increase in body temperature to 37-37.9 degrees (but in no case higher than 38). General weakness, irritability, fatigue, sensation of itching or tingling in the uterus are also possible. Feelings of a woman at the time of attachment of the embryo to the uterus resemble those before the month, but a day after implantation of the embryo in the blood will appear a chorionic gonadotropin, and the pregnancy test begins to show that there will be no monthly, and the uterus is growing embryo.