Many families in which there are already several daughters by all means wish that they had also a male successor. Impatient parents do not want to wait for favor by nature and try to do everything possible in order that at them the probability of the birth of the boy increased.
There is a theory according to which the spermatozoa bearing in themselves U-chromosomes (the chromosomes which are responsible for a male of the child) are more active, than spermatozoa with X-chromosomes, however, are less hardy. Planning the boy's birth, to try to conceive it follows directly during an ovulation or before it. To define when you have an ovulation, it is possible or a calendar method, or by means of special tests.
Other hypothesis claims that during an orgasm the organism of the woman produces alkali which kills sluggish "female" spermatozoa, and here quick spermatozoa with the U-chromosome manage to reach an ovum. You want you to give birth to the boy – suggest the husband to try properly.
The French have an opinion according to which the woman needs to adhere to a special diet to give birth to the child of a desirable floor. Ladies who want the boy should include in the diet meat products, eggs, fish, it is as much as possible hot and spicy dishes. It is worth refusing fermented milk products and sweets temporarily. Most communities of mammals is constructed by the principle: one male on several females. The number of the sexual intercourses made by a male are normal, it is quite high. If the male copulates insufficiently often, he begins the strengthened development of spermatozoa with X-chromosomes (there are not enough females - the mechanism of their reproduction is started). In an opposite situation when too many females are the share of one male, on the contrary, the quantity of spermatozoa with U-chromosomes will prevail. And at people. Than more often you will have sex, that high probability of the fact that you will give birth to the boy. However the only method which can guarantee you the boy's birth, this artificial insemination in total with the genetic analysis. For a start several ova of mother are impregnated, and after the analysis the sex of embryos is defined. "Unwanted" germs remove.