Prelabour rupture of membrane (PROM) is a cause for 85% of the neonatal period morbidities and fatalities. PROM is the main cause of preterm deliveries and accounts for 30-40% of these cases, indeed it complicates three percent of all pregnancies. The fetal and maternal mortality and morbidity risks of PROM, increases when the rupture occurs early in the course of pregnancy. In this study we sought to compare the detection efficiency of the standard diagnostic test of PROM with other new methods such as urea and Creatinine of vaginal fluid and Amnisure tests. The study sample is composed of 90 women divided into three groups; each woman had informed consent, questionnaire with full history, clinical examination (general and abdominal and sterile speculum examination to detect cervical dilatation, amniotic fluid leakage for sample collection to do Fern, Amnisure, Creatinine and urea tests. General investigations and ultrasound were done for each patient. Mean vaginal fluid Creatinine level among the group (1) were 0.44±0.14, versus 0.38±0.12, and 0.24±0.08 among group (2) and (3) respectively. When the results of the tests compared with the standard method of diagnosis, the specificity was 100% for Amnisure, vaginal fluid Creatinine and urea, while it was 80% for fern test. The sensitivity was 97% for Amnisure, 95% for vaginal fluid urea, 91% for vaginal fluid Creatinine and 60% for fern test. Amnisure is superior for other tests followed by vaginal fluid urea level, Creatinine and lastly Fern test.