When an egg is fertilized, it migrates into the uterus and nests there. It quickly divides into more and more cells. The placenta develops and the embryo grows up.
In the ovaries, female oocytes have been developed in several ovules (follicles) since the last month’s bleeding. Approximately 10 to 14 days before the next month’s bleeding usually occurs with one of the oocytes to ovulation. The egg pile bursts and releases the egg. It is caught by the funnel-shaped and mobile end of the fallopian tube. Muscle movements and fine hairs then transport the egg slowly in the fallopian tube.
The egg is fertilized Within the next 24 hours the egg can be fertilized in the fallopian tube. For this purpose, a male sperm cell must reach its goal and merge with the ovum. In the case of fertilization, the genetic information of the female egg and the male sperm cell are recombined – a blueprint for a new human being. The male sex chromosome determines whether a girl or a boy will develop. If fertilization does not occur, the egg will dissolve, and the period begins at the end of the cycle.
The egg is nesting After fertilization, the egg migrates through the fallopian tube into the uterus within the next four to five days. It divides several times. When she reaches the uterus, she nests there in the dilated uterine lining. Thus the actual conception is completed. The supply is secured The next week the embryo spends “beating roots”.
A part of the cells develop into the actual embryo, another part specializes in its care: the mother cake (placenta) begins to develop and anchors itself in the uterine lining. In exchange with the maternal blood, the placenta takes care of the supply of the unborn child with oxygen and nutrients. From further cells arise the fruit-bubble and the fruit-water. At the end of the first month of pregnancy, about two weeks after fertilization, the embryo is still tiny and scarcely larger than a pinstitch in a piece of paper.