Gynaecology & Obstetrics pH of vaginal secretion is varied according to the levels of estrogen. Vaginal pH is MOST acidic during: A Menstruation B Pregnancy C Puerperium D Newborn 💡 Explanation pH of vaginal secretion is varied according to the levels of estrogen. Vaginal pH is MOST acidic during: ✓ Correct Answer: B. Pregnancy