How to Conceive a Boy: The Only Guaranteed Method

How to Conceive a Boy: The Only Guaranteed Method

There have been many claims that changing when you have sex or changing your sexual position will help increase your chances for having a boy or a girl. Is this true?

Today's article is about trying to use sex, timing or sex position to conceive a boy.

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Gender of an embryo determined by the sperm

First, a little scientific background in human beings. The gender of a baby is determined by the chromosomes. Females have two X chromosomes and males have one X and one Y chromosome.

All of the eggs in a woman's ovaries contain an X chromosome. However, exactly one half of the sperm from a man contains an X chromosome and one half contains a Y chromosome.

After a couple has sex, if a sperm with an X chromosome fertilizes an egg, the embryo produced will be female. If a sperm with a Y chromosome fertilizes an egg, the embryo will be male.

Since half of the sperm have a Y chromosome, half of all embryos made will be male embryos.

Are some men only capable of making boys or girls?

Some couples who have had multiple children of one sex believe that the male only produces one kind of sperm or the other. This is not true.

Those men still have equal amounts of each kind of sperm. When I do IVF on those couples and test the gender of the embryos, it still comes out to be around 50 percent boys and 50 percent girls.

Is there a difference between X and Y sperm?

But let's look closely at an X chromosome and a Y chromosome.

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As you can see, the Y chromosome is much smaller. Some people have claimed that this makes the sperm, which hold a Y chromosome, swim faster, but not survive as long.

However, there's actually no evidence that X and Y sperm swim at different speeds and there's no evidence that they survive differently.

Does sex closer to ovulation produce more boys?

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So this theory is flawed right from the start. According to the theory, if you have sex closer to the time of ovulation or if your sexual position releases sperm closer to the cervix, which is the opening of the uterus, then the faster swimming male forming sperm will be more likely to reach the egg and increase the chances for a boy.

Studies about sex timing and chance for having a boy

Three studies have tried to test this theory. The first two studies came up with opposite results. One said that the chance for a boy was increased and the other found the chance for a boy was decreased.

These studies had various problems which limited their accuracy. However, this study of over 200 couples use highly accurate methods to determine the time of ovulation and had couples keep a diary of when they had sex.

No surprise, the timing of sex had no influence on whether the couples had a boy or a girl.

Does IUI influence the chance for a boy?

Need more proof? OK, one method that fertility doctors used to help couples get pregnant is called Intrauterine Insemination, or IUI.

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With this method, sperm are placed directly into the uterus at the time of ovulation. Based on the sperm theory I talked about earlier, almost all of the babies born from IUI should be boys because the timing of the IUI is exactly on the day of ovulation and because the sperm are released closer to the egg than is even possible with intercourse.

This study looked at over 6,300 babies that were born as a result of IUI. How many do you think were boys? 90 percent? 70 percent? Here are the results:

Pretty close to 50 percent of the babies born were boys!

In other words, timing and position did not improve the chance to conceive a boy.

Is there anything that increases the chance for a boy?

If changing position or timing didn't work, is there anything you can do to increase your chances for a boy?

The only guaranteed method is with IVF in which you can test the embryos to see which are males or females. There is legitimate scientific evidence that changing a woman's diet can help a little bit.

One word of warning. Don't believe testimonials from websites or videos. Remember, about 50 percent of babies are going to be boys. So any method designed to increase the chances for a boy will work about 50 percent of the time.

We give honest science based tips that have helped people all over the world have their baby. If you want to improve your odds for success, feel free to visit our solutions to boost your fertility and increase your chances of getting pregnant.