Prom pprom

A gravida 3, para 2 patient at 32 weeks gestation presents for obstetric evaluation due to leakage of small amounts of fluid into her underwear over the past several hours. She has no pelvic pain or contractions. A sterile speculum examination reveals no obvious pooling in the posterior vaginal fornix. Which of the following additional findings would most support a diagnosis of preterm prelabor rupture of membranes (PPROM)?

1: Fundal tenderness
2: Amniotic fluid index (AFI) of 8 cm on ultrasound examination
3: Thin green-yellow discharge with vulvovaginal erythema
4: Vaginal fluid with a pH of 7.2 and arborization when viewed under the microscope