For many years married couples are trying to have a descendant of a certain sex. But the query whether it is feasible to adjust the sex of an infant beforehand is rather significant.

Males implement a decisive role in defining of the embryo's sex. It is important to know that every ovicell bears only X-chromosome and never has Y-chromosome. A male cell holds different chromosomes: X and Y. That is why sex chromosome of a male identifies sex of a kid. It's impossible for ovigerms to be fecundated by the same cells, alias just girls would appear. In the meantime, there are couples that bear only girls or boys. The birth rate of boys and girls is approximately the same but still there is a disposition to predominance of boys. All these scientific procedures might simply disappear from your memory due to girs kiev.

When the semen pervades into the ovigerm, the process of approaching of nuclei begins. Nuclei grow in size and that's why there begins the procedure of originating chromosomes from the heterochromatin that is a raw stuff. Thin sheath which circumscribes the series of chromosomes bursts in both cells. The nuclei of cells come close to each other and fuse into one unity. After the fusion ovule turns into embryo with stuffed genetic information.

In ancient times people trusted the fact that boys and girls appeared from left and right testis. Wise men advised employing varied extreme positions to originate a baby of a desirable sex. Read more »