Understand the process of conception above all, the spermatozoon that is the activity after pointing to sexual intercourse arrives through the uterus tubal crock abdomen is oosperm with ovum encountering, union, oosperm carries the process inside uterine antrum via oviduct again.
And sexual distinction parts by the egg that X chromosome contains in be fertilized process and X spermatozoon, Y spermatozoon sets a decision, be united in wedlock when ovum and X spermatozoon, the darling that is born is a female (XX) ; Be united in wedlock when ovum and Y spermatozoon, the darling that is born is the male (XY) . From this schoolboy of knowability chromosome opposite female have main effect, we understand the characteristic of X spermatozoon, Y spermatozoon.
1, X spermatozoon characteristic is: Show ellipse model, head large remaining part is short, the action is slow, but acid-proof sex is strong, vitality is strong, surviving time is longer, after entering the vagina, can survive in uterine antrum or oviduct 2-3 day.
2, Y spermatozoon characteristic is: Show round sharp contrast, the head is pointed speed of end weak point, move about faster, happy event is alkalescent and acid-proof quality weak, vitality weak, surviving time is shorter, after entering the vagina, be in child antrum and tubal memory are vivid only 24 hours.
As a result of these characteristics of X spermatozoon and Y spermatozoon, unripe boy gives birth to female existence to be able to charge a sex, so what element can affect the child's sexual distinction?1, suffer genetic effect, give birth to schoolboy daughter to have familial tendency normally.
2, the effect that suffers food, have research discovery, y sex chromosome likes alkalescent environment, x sex chromosome likes acidity environment. So, want to give birth to a little bit boy probability is big, the female should eat more in equipment pregnancy slant alkalescent food, want to give birth to the girl to eat more some slant acidity food.
3, the period of of the same branch of a family, purposeful choice makes love, going up somehow can affect sexual distinction. The female's vagina shows acidity commonly, when oviposit day cervix canal secretes antrum alkalescent stickiness fluid, vaginal PH lifts alkalescent, suit the spermatozoon activity of Y sex chromosome, the machine rate of unripe boy increases. In of the same branch of a family of period of oviposit day around, the vagina shows acidity, rate of unripe girl machine is old.
4, tall caloric food, british scientist makes clear to 700 female investigation and study that are pregnant first, absorb in daily before be pregnant life contain quantity of heat tall it is food, the life boy of 56% , and absorb low caloric food to give birth to the girl.
5, the pose of of the same branch of a family, the female when of the same branch of a family amounts to a climax, cervix secretes alkalescent secretion more, suit Y spermatozoon activity, rate of unripe boy machine is old.
