Intrapartum Rapid GBS Testing in Patients Presenting With Threatened Preterm Labor

Inclusion Criteria: * Age ≥ 18 years * Pregnant women presenting for unplanned obstetrical care at a participating clinical study site * Gestational age between 21 6/7 and 36 6/7 weeks * Subject has not participated in the study before * Subject agrees to complete all aspects of the study and provide informed consent in accordance with applicable regulations * Signs and/or symptoms suggestive of preterm labor, whereby the managing clinician suspects preterm labor * Uterine contractions (with or without pain) * Intermittent lower abdominal pain, dull backache, pelvic pressure * Vaginal bleeding during the second and third trimester * Menstrual-like intestinal cramping (with or without diarrhea) * Change in vaginal discharge (amount, color, or consistency) * Vague sense of discomfort characterized as "not feeling right" * Change in cervical exam (cervical dilation, effacement, or consistency) * Signs and symptoms necessitating preterm delivery (i.e abruption, preeclampsia, hemolysis elevated liver enzymes, low platelet (HELLP) syndrome, ruptured membranes, chorioamnionitis, fetal indications) Exclusion Criteria: * Exposure to antibiotics within 1 week prior to enrollment (15) * Known GBS bacteriuria at the time of enrollment * Prior history of neonatal GBS sepsis