Final answer:
The Nitrazine test and the Fern test are two tests that show the membranes have ruptured. The Nitrazine test involves testing the pH of the vaginal fluid, while the Fern test involves examining the vaginal fluid under a microscope for a fern-like pattern.
Step-by-step explanation:
Two tests that show the membranes have ruptured are the Nitrazine test and the Fern test.
The Nitrazine test involves using a pH indicator strip or swab to test the vaginal fluid. Ruptured membranes will cause the fluid to have a pH higher than 6.0, indicating the presence of amniotic fluid.
The Fern test involves examining a sample of the vaginal fluid under a microscope. If the fluid forms a fern-like pattern when it dries, it is a sign of amniotic fluid leakage and suggests that the amniotic membranes have ruptured.