All Patients will be put in the dorsal lithotomy position.Using a proper light source and sterile gloves, a sterile speculum free of lubricants will be placed into the vagina before vaginal examination by senior resident and the special Dacron swab from the fetal fibronectin kit will be used to collect a sample of secretions from the posterior fornix. The sample will be obtained prior to collection of any vaginal wet preparations, before any cervical manipulation or cervical cultures, and if enough amount of fluid (about 2ml) is not found, vagina will be washed with 2ml of normal saline.The swab will be placed in sterile plastic containers which will be stored until assayed quantitatively with an Enzyme-Linked Immuno Sorbant Assay.