A 32 weeks pregnant female presented with labor pains and minimal vaginal discharge, on analysis of the cervicovaginal discharge showed presence of fetal fibronectin. What is the probable diagnosis?
Preterm labour
IUGR
IUD
Cervical infection
Fibronectin is a glycoprotein that binds amnion and chorion to the decidua of uterus. Normally present in the cervicovaginal secretions before 22 weeks and after 37 weeks of pregnancy. Presence of Fibronectin (>50ng/ml) in between these weeks is suggestive of preterm labor. When the test is negative it reassures that delivery will not occur within next 7 days.