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pH is a measure of the acid-base balance of whatever substance is being
tested.
Vaginal secretions are normally slightly acid (pH <5.0).
In testing for the presence of amniotic fluid (during pregnancy, to rule
in/out ruptured membranes), the more basic amniotic fluid will turn
nitrazine paper a dark blue, indicating a pH of >6.0, and confirming
ruptured membranes.
In testing for the presence of bacterial vaginosis, vaginal infections
with anaerobic bacteria are often associated with a pH >5.0.
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Normal Values
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Source:
Operational Medicine 2001, Health
Care in Military Settings, NAVMED P-5139, May 1, 2001, Bureau
of Medicine and Surgery, Department
of the Navy, 2300 E Street NW, Washington, D.C., 20372-5300
OB-GYN 101:
Introductory Obstetrics & Gynecology
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Brookside Associates, LLC
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