What is fetal fibronectin test or fFN?


This is a diagnostic test used for predicting the risk of going into premature labor. It is similar in procedure to a pap smear and is performed between weeks 24 and 34 and when there are symptoms of preterm labor. The test can only be conducted on intact membranes and when cervical dilation is minimal (i.e. less than 3 cm). It is an expensive procedure and is not routinely offered to every pregnant woman.