Fetal formation in the first month

The fertilized egg begins to swim in the fallopian tube immediately after fertilization towards the uterus, usually lasting three to four days, until eventually reaching there, and the uterus feels The egg arrives at it very quickly and begins to secrete a number of hormones, and make the necessary adjustments on the lining of the uterus, in order to facilitate the adhesion of the egg in the wall of the uterus and stabilize the occurrence of pregnancy, and cases where the egg fails to adhesion failure pregnancy, leading to abortion.

Stages of fetal growth in the first month

The first cell of the fetus is formed during the fourteenth day of the first day of the last menstrual cycle, after fertilizing the sperm of the egg.
The egg begins fertilization by dividing, to be a small number of cells, and these cells are specialized in the composition of different body organs.
The egg begins to move from the fallopian tube towards the uterus. In this period, the cell feeds on food soluble in the liquid of the cell, which is sufficient for only a few days.
The cell reaches the uterus and uses the uterine fluid to get its food from it.
The uterus begins to expand and expand to take its size by inflation gradually.
The fertilized egg still has its cells continue to divide, even reaching hundreds of cells.
On the tenth day of fertilization, the egg stabilizes in the lining of the uterus, where the nesting occurs here, that is, the egg builds a nest inside the womb, where it begins to move slowly into the uterus, so that it can benefit from food and oxygen and waste disposal.
The umbilical cord is formed. Its blood vessels are connected to the fetal blood vessels at their junction, to be the only source of food and oxygen for the fetus during the rest of the pregnancy months, as well as to receive excretions from the embryo’s body.
In the third week, the fetus takes a round shape wrapped in hundreds of hollow cells filled with fluid. Some organs begin to grow, including the eyes, the primary brain, and some parts of the heart and nervous system.
In the fourth week, the hollow cells grow into a three-tiered disk, a thin-sized amniotic sac containing a set of living membranes.
The first month ends and the embryo starts to pulse, but it is impossible to hear the pulse, because of the small size of the heart and the weakness of beatings, while the fetus is 1.25 cm long, and weighs 28 g.