What does FFN represent in the context of pregnancy?

FFN, or fetal fibronectin, is indeed a biological glue that binds the fetal sac, or amniotic membrane, to the uterine lining. This protein is critical during pregnancy as it plays a role in maintaining the adhesion of the membranes and the fetus to the uterus. The presence of fetal fibronectin in the cervicovaginal secretions is often measured as a marker to assess the risk of preterm labor. If it is detected, it can indicate that the biological glue is breaking down, potentially signaling an increased likelihood of preterm birth due to disruptions in the normal supportive mechanisms of pregnancy.

Understanding the role of FFN goes beyond just its definition. The timing and presence of this protein are used in clinical practice to help manage the risk of preterm delivery, ultimately guiding conversations regarding treatment options and interventions for those at risk. The other options do not accurately represent FFN's role in pregnancy; for example, it is not a hormone nor directly produced by maternal cells, nor is it an indicator of pathogens during labor.