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To look at why semen pH is important, we first have to look at the other half of the equation: the vagina. In an ideal world, vaginal pH maintains a balance of good and bad bacteria, which helps prevent infections. However, to protect from bad bacteria and maintain a healthy balance, the vaginal environment tends to be slightly acidic. Vaginal pH levels also change frequently, depending on the time in her cycle, sexual activity, even her diet and exercise. So what do her pH levels have to do with your swimmers? Like we said, your semen exists largely to protect your sperm from the outside environment.
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Gender Swaying: The pH Factor

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pH (Acid / Alkaline) for Gender Swaying : gehoorbescherming.info

Conceived and designed the experiments: JZ BY. As the chemical environment of semen can have a profound effect on sperm quality, we examined the effect of pH on the motility, viability and capacitation of human sperm. The sperm in this study was collected from healthy males to avoid interference from other factors. The spermatozoa cultured in sperm nutrition solution at pH 5. Our results showed that these parameters were similar in pH 7.
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The Basics of Semen pH

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