What test will determine if there is leaking amniotic fluid?

The nitrazine test is specifically designed to identify the presence of amniotic fluid. This test works by measuring the pH of the fluid; amniotic fluid typically has a higher pH (alkaline) than vaginal secretions. When a sample of fluid is examined, a change in color on the nitrazine paper indicates whether it is more likely to be amniotic fluid, suggesting a rupture of membranes.

In contrast, a complete blood count measures the components of the blood, a glucose tolerance test assesses how well the body handles glucose (often used to screen for diabetes), and a pelvic ultrasound provides imaging of the reproductive organs but does not specifically test for amniotic fluid leakage. Therefore, the nitrazine test is the most appropriate choice for determining if there is leaking amniotic fluid.