![]() How to try for a girl with the Shettles method Related: When can you find out the sex of your baby? And female sperm tend to survive longer in the acidic conditions of the vaginal canal.Īs a result, the actual method for conceiving a girl or boy via the Shettles method is dictated by timing and environmental conditions that help favor male or female sperm. ![]() In addition to physical differences, Shettles believed that male sperm tend to swim more quickly in alkaline environments, like in the cervix and uterus. And the opposite also rang true for the men who had mostly female kids. In the cases where the men had mostly male kids, Shettles discovered that the men had far more Y sperm than X sperm. Interestingly, he also studied sperm in some rare cases where men had fathered either mostly male or mostly female children. On the flip side, X (female) sperm are heavier, larger, and have oval-shaped heads. What he theorized based on his observations is that Y (male) sperm are lighter, smaller, and have round heads. Shettles studied sperm cells to observe their differences. Of course this depends on the most general understandings of what sex is and how it is defined. If the sperm that fertilizes the egg carries the X chromosome, the resulting baby will likely inherit XX, meaning a girl. If the sperm that fertilizes the egg carries the Y chromosome, the resulting baby will likely inherit XY, which we associate with being a boy. Roughly half of these sperm may be coded with the X chromosome while the other half carry the Y chromosome. Men, on the other hand, produce millions of sperm during ejaculation. A woman’s eggs are genetically coded with the female X chromosome. The sex of your baby is determined in the most basic way at the moment when the sperm meets the egg. So, if you’d like some in-depth reading, you might consider picking up Shettles’ book “ How to Choose the Sex of Your Baby,” which was last updated and revised in 2006. As you can imagine, this information was in high demand. (More on that process in a minute.)įrom his research, Shettles developed a method that takes all these factors into account. After all, the sperm that fertilizes the egg is ultimately what determines the sex of the baby. ![]() Shettles studied sperm, the timing of intercourse, and other factors, like sexual position and the pH of body fluids, to determine what might have an effect on which sperm reach the egg first. Shettles, a physician living in the United States. The Shettles method has been around since the 1960s.
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