Rapid Amniotic Fluid (AF) Test and a Non-Invasive Vaginal Fluid (VF) Test

Inclusion Criteria: 1. Subject is ≥ 18 years of age 2. Subject has singleton gestation 3. Subject has fetus with gestational age ≥ 22 0/7 weeks and ≤ 33 6/7 weeks 4. Subject has had evidence of spontaneous preterm labor as evidenced by documented regular uterine contractions (≥4 per hour) and one or more of the following: 1. Cervical dilation \> 2cm 2. Cervical length of ≤25 mm via transvaginal ultrasound 5. Subject has onset of contractions was within 48 hours of enrollment in the study 6. Subject has documented intact amniotic membranes 7. Subject's care provider plans to perform an amniocentesis procedure - Exclusion Criteria: * 1\. Subject has documented ruptured amniotic membranes 2. Subject has a fetus with major fetal or genetic anomaly or chromosomal aneuploidy 3. Subject has maternal or fetal indication for preterm birth (e.g., pre-eclampsia) 4. Subject is unable to provide written informed consent 5. Subject has evidence of non-reassuring fetal heart rate tracing requiring immediate delivery 6. Subject has vaginal bleeding within the past 24 hours 7. Subject has advanced labor (cervix \>4 cm dilated) 8. Subject has HIV, hepatitis 9. Subject has not been enrolled previously in this study and/or is participating in another study (that in the opinion of the Investigator) may interfere with participation in this study