First of all, I need to put you through certain knowledge about the gender of a baby. There are two chromosomes in the semen of a man as well as in the ovum/egg of a woman. A man’s sperm has either an “X” or a “Y” chromosome while a woman’s egg has only an “X” chromosome. When a man ejaculates during sex, about 200 to 400 million sperms are released. Only one sperm would be accepted by the woman’s egg. When the sperms gets to the egg, fertilization may occur and if it does, then it would lead to conception. I mean it would lead to pregnancy. A man has XY chromosomes while a woman has XX chromosomes. If a sperm that carries an X chromosome fertilizes the egg, the foetus would have XX chromosomes and the conception would lead to a female offspring. But if a sperm that carries a Y chromosome fertilizes the egg, the foetus would have XY chromosomes and the conception would lead to a male offspring.
Pregnancies with a male foetus are much more fragile , more delicate and more susceptible to miscarriages than pregnancies with a female foetus. So, nature found a way to balance this by creating a male to female baby conception ratio of 51 male foetus to 49 female foetus. It means that every pregnant woman has 51 percent chances of having a male foetus and 49 percent chances of having female foetus.
Having put you through the fore knowledge, I think we can get to the core now…
The only method that has a 100 percent guarantee is the artificial insemination in which the man’s semen is taken. It would be worked on to extract some Y chromosome-carrying sperms and it would be manually deposited into the woman’s vagina. It is effective but very expensive.
Sperms carrying Y chromosomes move faster than sperms carrying X chromosomes, so it is recommended that couples looking for a baby boy should have sexual intercourse between 24 hours before the woman’s ovulation and 12 hours after her ovulation. This is because at this period, fertilization of the woman’s egg with a Y chromosome-carrying sperm has about 85 percent chances of occurrence.
During sexual intercourse, the deepest possible penetration is recommended. It would allow the sperm to be deposited very close to the cervix and ovum. This would allow the Y chromosome-carrying sperms to get to the egg first, since they move faster than their X chromosome-carrying counterparts. When that happens, the sperm that would fertilize the egg would be one of the Y chromosome-carrying ones.
The next tip is more of a superstition than a scientific discovery. But since, it has no side effect and you’ll have nothing to loose, I think it’s worth a trial. It is believed that a substance in coffee makes sperms carrying a Y chromosome much more active than sperms carrying an X chromosome, so it is advised that the man should take a cup of coffee just before a sex.
Sperms carrying a Y chromosome have shorter life span than sperms carrying an X chromosome. So, men are advised to avoid wearing very tight and warm shorts or trousers since tight clothes kill sperms and the Y chromosome-carrying ones are likely to die first.
In conclusion, all the methods , instructions, tips and recommendations given above, apart from artificial insemination are based on chances and probabilities and so are not 100 percent effective. But they can be so helpful if they are followed strictly.
