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任何液体均具有pH值，即酸碱度，阴道分泌物，即白带，通过检测可以检测出pH值。通常阴道是酸性环境，pH值＜7，酸性环境有利于除掉杂菌，是阴道自净作用防御功能的重要一环。但有时阴道会出现pH值改变以及菌群紊乱，表现为pH值升高，呈碱性，最常见

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