What Is Vaginal pH?

One of the dominant factors for influencing your baby’s gender is your vagina’s pH level, which will allow female or male sperm to thrive. Here’s how it works: The gender of an embryo is determined by the chromosomes carried by the male sperm. A single sperm can carry either the X (female) or the Y (male) chromosome. Male sperm swim faster, but survive for shorter periods of time than their female-producing counterparts; female sperm are stronger and more resilient, yet swim slower than the male sperm. Since female sperm are more resilient, they have a higher chance of surviving in an acidic environment. This same environment causes male sperm to die faster, thus making it easier for the female sperm to reach the egg. Conversely, an alkaline environment is more favorable to the male sperm, increasing their chances of surviving in the race to the egg.

There are many natural ways of controlling your vagina’s pH level. The easiest way to achieve the right acidic or alkaline level is through nutrition. 

What to eat and what to avoid

To conceive a girl, you’ll need to optimize for an acidic environment by eating foods with magnesium and calcium. We recommend that you try to increase acidic foods like dairy products, eggs, and grains. You’ll also want to reduce your consumption of high alkaline foods such as watermelon, oranges, and bananas. Finally, there are some vitamin supplements (like folic acid and vitamin C) that can increase acidity in your vaginal environment. 

If you are trying to conceive a boy, you can improve your chances by raising the alkaline environment in your vagina. Try to avoid eating dairy products and decrease foods with magnesium and calcium. Increase your intake of alkaline foods such as almonds, carrots, avocados, and cherries.

While we recommend incorporating certain foods into your diet and taking specific supplements, it is always best to get individual advice from a doctor or registered dietitian. You can create your own diet or get a personalized diet from Nili by signing up for our 12-month fertility program <here>.

Intercourse do’s and don’ts

Another way you can influence your baby’s gender is based on the depth of sexual penetration during intercourse.

You will increase your chances of having a girl if you avoid deep penetration, preventing the boy sperm from reaching and fertilizing an egg. When a vagina is acidic, it’s more favorable for the female sperm, making it easier for them to reach the egg first. 

On the other hand, to increase your chances of having a boy, you want deeper penetration near the opening of the cervix. Here the area is more alkaline, and the male sperm have a higher chance of being first to reach and fertilize an egg.