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Gender Selection: The Shettles Method

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I have heard that I can help determine the gender of my baby. How can I do this?

You are probably thinking of the Shettles Method which is based on the premise that sperm carrying the X and Y chromosomes have different characteristics and that you can influence the reproductive environment to favor one or the other. While there is some controversy surrounding both the credibility and the morality of the method, here's how the theory goes:

It is the sperm that fertilizes the egg that will determine the sex of your baby. Some sperm carry the X-chromosome and some sperm carry the Y-chromosome. If an X-chromosome-carrying sperm fertilizes the egg, the baby will be a girl. If a Y-chromosome-carrying sperm fertilizes the egg, the baby will be a boy.

The idea behind the Shettles Method of sex selection is based on the premise that the X and Y chromosome carrying sperm have different characteristics and that under different circumstances either X- or Y-chromosome-carrying sperm will be more likely to fertilize the egg.

The Y-chromosome-carrying sperm are said to:

The X-chromosome-carrying sperm are said to:

Based on these premises, according to Shettles, you can time intercourse, choose a sexual position that favors conception of your preferred sex and influence the reproductive environment to increase the likelihood of conceiving your preferred sex. These are the suggestions from Dr. Shettles:

To Get A Boy (According to Shettles):

To Get a Girl (According to Shettles):

If you are taking longer than expected to conceive, it is generally not recommended to attempt any kind of sex selection as it can increase the time it takes to conceive.

See also: Review of scientific articles about intercourse timing and gender selection.

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