If blood gets in the sample or if there is an infection present, the pH of the vaginal fluid may be higher than normal. This test, however, can produce false positives. A blue strip means it’s more likely the membranes have ruptured. The strips will turn blue if the pH is greater than 6.0. The strips change color depending on the pH of the fluid. This test involves putting a drop of fluid obtained from the vagina onto paper strips containing Nitrazine dye. Therefore, if the membranes have ruptured, the pH of the sample of vaginal fluid will be higher than normal. Amniotic fluid has a higher pH of 7.1 to 7.3. Normal vaginal pH is between 4.5 and 6.0. This test involves testing the pH of a sample of vaginal fluid. This allows them to examine the inside of the vagina and to collect fluid directly from the vagina. They will insert the speculum into the vagina and gently spread apart the vaginal walls. Your health care provider will collect some fluid from the vagina using a medical tool called a speculum in order to do most of these tests. Since the fluids might be contaminated with blood or other secretions, these tests look for substances or certain characteristics that are normally only found in amniotic fluid.

Tests for PROM involve analyzing vaginal secretions to determine if amniotic fluid is present. They will then order tests to help confirm PROM or PPROM. Your health care provider will examine you and observe the fluid coming from the vagina. If you suspect that your water has broken and there is fluid leaking from the vagina, your health care provider will need to confirm that the membranes have actually ruptured.

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