The Shettles Method
Popularized in the book, How to Choose the Sex of Your Baby, Dr. Shettles bases his theory of gender selection on the idea that sperm containing Y chromosomes, which produces males, move faster than X chromosome-carrying sperm. For this reason, he recommends that couples who want to conceive a boy have intercourse no more than 24 hours before ovulation to 12 hours past ovulation. He also believes that deeper penetration or even rear-entry penetration will deposit sperm closer to the cervix, allowing the more aggressive Y sperm to get a head start in fertilization.
The Whelan Method
The Whelan method of at-home gender selection was developed as a rebuttal to Dr. Shettles's bestselling book. As outlined in Boy or Girl, Dr. Whelan believes that the timing of intercourse is crucial to determining the sex of the baby. In her opinion, having sex earlier in your monthly cycle is more likely to produce male offspring. According to her research, the Whelan method will help couples conceive sons 68 percent of the time.
Chinese Conception Chart
Also known as the Chinese Gender Chart or Chinese Birth Chart, the Chinese Conception Chart is a method of at-home gender selection that says the mother's age and the month of conception can predict the sex of an unborn baby. The Chinese Conception Chart was first discovered in a royal tomb near Beijing more than 700 years ago and is rumored to be more than 90% accurate when used properly. However, it's important to remember that you must use the mother's lunar age and the baby's lunar month of conception to make your prediction. Basing your calculations on our calendar system will often produce the wrong
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