What is the normal value of vaginal pH to be considered normal?

Patient's question:

No

Doctor's answer:

Under normal circumstances, the vagina is slightly acidic, with a pH of about 4.4, which can inhibit the reproduction of most pathogens while not killing sperm. The vaginal pH is always maintained at a weakly acidic level because the female vaginal secretions are rich in glycogen, and lactobacilli grow in the vagina for a long time. While utilizing glycogen, they produce lactic acid, which helps maintain a slightly acidic environment in the vagina. This makes it unfavorable for pathogens to reproduce, giving the vagina a "self-cleaning" function.