Determining the sex of our children has always been a desire of mankind. For this, just think of the royal houses that always looked forward to the arrival of a male.
The influence on the sex of the baby is based on the relationship between ovulation and time of intercourse.
The U.S. scientists Lendran B. Shettls and David M. Rorwik of Harvard University conducted a study on the method of sex selection. They investigated that the sperms with one X chromosome, responsible for conceiving a girl, live much longer than those with a Y chromosome (crucial to the conception of a boy). While the latter are faster, they cannot survive more than a day.
The research observed that in the ejaculate, sperm cells with Y chromosomes are more in number on an average, than cells with chromosome X. This excess is diminished when sperms enter the acidic environment of the vagina during sex. X sperms that manage to survive in this environment longer than sperm Y.
The closer is ovulation, more alkaline the vaginal secretions become, thus increasing the chances of fertilization by a sperm Y. It follows that the most important role in the “method of sex selection” is the relationship between ovulation and the day of intercourse.
When you have sex in 2 or 3 days prior to ovulation, the environment of the vagina is acidic, which is very favorable for the sperm X. If you do it just before ovulation, the chances of conceiving a boy are increased.
In addition, there are number of other factors that influence the sex of the baby: for instance, if the woman reaches orgasm before the man, a hormone is released that makes the environment more alkaline and is more likely to conceive a male child. If you want to have a boy, it is important to abstain sexually between 4 and 7 days before ovulation. During this time, the concentration of sperm increases, and therefore there are more chances of conceiving a child. Higher temperatures are not favorable to the Y sperm, which are mostly smaller and less resistant. Therefore, it is advisable for men not to have bath with hot water and not to wear tight clothes.Shettls recommended that parents should aim for deep penetration during intercourse to conceive a male child, because this would produce ejaculation near the cervix.
If you want a girl, it is recommended to maintain relations between 2 and 4 days before ovulation. In this case, the sperm with X chromosomes that live longer and produce a female baby. They can wait in the fallopian tubes for the egg to be fertilized. If you are planning to have a girl, have sex daily starting from the last day of menstruation until 2-4 days before ovulation. This will cut the number of sperm in the semen. In this case the missionary position is most favorable, because the semen will not stop directly at the cervix and the acidic environment is more conducive to sperm X. Women should not reach orgasm during sex.
In summary it can be said that both the conception of a baby as well as the prediction of sex of the baby depend crucially on the determination of the date of ovulation. In most cases, women do not notice their ovulation. Only 10-15% of cases, women feel a slight pain in the abdomen when the follicle ruptures.
Fertility monitors help determine the fertile days and predict ovulation. If you also want to plan the sex of your baby, it is best to use a fertility monitor in order to determine the date of ovulation, and proceed as described above on the theory of sex selection.
We would note that the conception of one sex in particular depends on several factors and that the recommendations above simply increase the chances of achieving the desired sex but nothing is guaranteed hundred percent.