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How to Conceive a Boy or Girl Baby at Conception

  • Published: 2013-11-11 (Revised/Updated 2018-02-27) : Author: Dr. HAV Monirath
  • Synopsis: Various ways to try, including the Shettles Method, to conceive a boy or girl baby, includes baby gender predictor calculator.
Ovulation and Conception

Ovulation - A process that takes place in the ovaries and is the process by which the ovaries release ova for fertilization. This usually takes place around day 14 of the menstrual cycle and is controlled by luteinizing hormone and follicle-stimulating hormone. An ovulated egg is viable within the system for roughly 2-3 days before it disintegrates. Conception is most likely to happen if sex is performed prior to ovulation, and timing plays a large role in successful conception.

Conception - Biologically, conception is defined as the moment when a sperm cell from a male breaches the ovum, or egg, from a female.

Main Document

"A more acidic environment favors girls, since it will kill the weaker y-sperms first, leaving a greater quantity of x-sperms available to fertilize the egg."

In this era of advanced technology, there are various home methods which we can use to determine our babies sex during conception - Most high-tech methods are very expensive and/or invasive.

How to conceive a girl or boy baby. Being a citizen and a Medical Doctor in a developing country like Cambodia, and as a result of some research and discussion with my professors, I personally suggest The Shettles method ( by Dr. Shettles ).

Shettles Method

Basically, men produce two types of sperms, the X (female) and Y (male). According to Dr. Shettles' studies the y-sperms are smaller, weaker, but faster than their siblings x-sperms, which are bigger, stronger, but slower.

Based on this fact, there are several things you can do to "favor" the conception of boys or girls:

(1) The most important aspect of all is timing of intercourse during the monthly cycle.

The closer to ovulation (Ovulation calculator) you have sex, the better the chances to have a boy, because the y-sperms are faster and tend to get to the egg first. If you have sex 3 days or more before ovulation, the better your chances to conceive a girl, because the weaker y-sperms tend to die sooner and the x-sperms will be available in greater quantity whenever the egg is released. On the other hand, having sex from 2 days before ovulation, through a few days after ovulation, is better for conceiving a boy. Around the 2-day point, 48 hours before ovulation, seems to be the 50/50 mark.

(2) The pH of the women's tract is also very important.

A more acidic environment favors girls, since it will kill the weaker y-sperms first, leaving a greater quantity of x-sperms available to fertilize the egg. On the other hand, a more alkaline environment favors boys. Shettles recommends a douche of water and vinegar (acid) immediately before intercourse to favor a girl; a douche of water and baking soda (alkaline) will help for a boy.(Don't try this without reading Shettles! You have to dilute the douches properly, according to his formula, or they won't help and might hurt you.)Note: Some women are naturally very acidic and have a hard time conceiving boys.

(3) Position of intercourse and depth of penetration are important, partly because of pH.

The closer to the entrance to the vagina, the more acidic the women's tract is. Also, deep penetration places the sperm closer to the egg, and gives those aggressive boy sperms a head start. So, a shallow penetration will favor girls and a deeper will favor boys. Shettles recommends missionary-position for a girl, and rear-entry (doggy-style) for a boy.

(4) Women's orgasms can also be important.

It also has to do with pH. When a woman has an orgasm, the body releases some kind of substance that makes the environment more alkaline, favoring boys. He recommends no orgasms when trying for girls!

(5) The sperm count is another factor.

Obviously, a low sperm count to begin with doesn't favor either sex. But a high sperm count favors boys. Shettles recommends three things:

(6) Finally, in trying for a boy

Shettles recommends a nice cup of caffeinated coffee for the man, right before sex - he isn't clear on how or why this works, but apparently it gives the Y-sperms a jolt!

Summary of the Conception Methods


Until now, there has not yet been any scientific proof and recognition of the most effective methods in determining baby's sex before conception. However, these SHETTLES methods seem to be the most reasonably accepted by medical professionals. And, most importantly, these methods do not cause any harm of waste of money, so why not give them a try?

Just for Fun! Chinese Baby Gender Predictor: Already pregnant and want to know if you're having a boy or a girl? This ancient chinese chart is "said" to predict your baby's sex based on your Chinese lunar age at the time you got pregnant and the Chinese lunar month in which you conceived.

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