What constitutes a normal pH level will vary slightly from womanto woman depending on their stage of life. You can expect, however,to be somewhere between 3.8 and 4.5, which is fairly acidic. lwancher During the reproductive years of 15to 49, your vaginal pH should not beany higher than 4.5. Just beforemenstruation and after menopausehowever, a healthy pH seems to oftenbe slightly higher than 4.5. That'sbecause blood has a pH of 7.4 A pH level above 4.5 can provide "bador harmful bacteria; the idealenvironment to thrive. A pH level thishigh can put you at the risk of conditionssuch as trichomoniasis and bacterialvaginosis.