A fetal egg is one of the first and most reliable signs of a normal uterine pregnancy. To see a rounded formation on ultrasound can be already two weeks after the delay in menstruation. At the same time, according to what the fetal egg looks like, not only the gestation period, but also its course, as well as the presence of possible pathologies, are determined. The norm is a rounded regular shape, and any deformations are an occasion for additional examination and constant observation.
Structure of the fetal egg
At the first stage of pregnancy the fetal egg is a group of cells that continue to divide on the way to the uterus. The egg is covered with an upper layer - the chorion, which ensures the supply of oxygen and nutrients.
At the last stage of pregnancy the fetal egg already occupies the entire uterine cavity and consists of the fetus, amniotic fluid and membranes, umbilical cord, placenta. The weight of the fetal egg with an already mature fruit is on average 5 kg.
Fertilization and development of the fetal egg
After fertilization, the egg starts its way to the uterus. During the movement, the process of division occurs, and by the time when the egg is in the uterus, there are already 32 cells. The movement takes 7 to 10 days.
After the ovum has reached its goal, the fetal egg is attached to the wall in the uterus cavity - nidation. During the movement of the egg through the fallopian tubes on the fetal egg, an upper layer is formed, which secrete enzymes that destroy the mucous membrane of the uterus. The same fetal egg is covered with villi, with the help of which the relationship with the uterus occurs during the first stage of pregnancy. Subsequently, the villi remain only at the attachment site.
It should be noted that two fetal eggs revealed on ultrasound indicate a multiple pregnancy. 2 or more fetal eggs in the uterus are defined as independent rounded formations, which are distinguishable already from 5-6 weeks.
Problems of development of the fetal egg
At the stage of nidation, there are a number of nuances. So, for example, successful attachment of the fetal egg depends on the speed of its movement through the fallopian tubes. If the egg moved too fast, then the membranes of the fetal egg do not have time to fully form. This means that the egg can not gain a foothold on the wall of the uterus, which, as a rule, results in miscarriage.
Also, a low attachment of the fetal egg is possible. This feature may not be dangerous for the child and mother, but needs constant monitoring. In addition, if the fetal egg is located low, there is a risk of a so-called cervical pregnancy. In this case, urgent intervention is needed, since such a pregnancy can not be maintained, and for the mother, such a pathology threatens to remove the uterus.
It is worth noting that when the pregnancy is interrupted, it is necessary to ensure that the fetal egg is completely gone. If the cause of miscarriage or any other pathology is not established, then the histology of the fetal egg is performed.
With ectopic pregnancy appears the so-called false fetal egg. In fact, such an egg
A serious pathology is the empty fetal egg . The reasons for this may be several: the age of the mother, genetic disorders, the use of medications that are contraindicated in pregnancy. In this case, for 1-2 weeks, an empty fetal egg is the norm, since the fruit on such a period is still invisible. But if in later ultrasound diagnosis is confirmed, then to keep such a pregnancy does not make sense. In this case, a medical interrupt is recommended.