What Is Fetal Fibronectin (fFN)?

Fetal fibronectin (also known as fFN) is a “glue-like” protein that holds your developing baby to the uterus wall.

Why fetal fibronectin is important

From weeks 22 to 35 of gestation, fetal fibronectin acts like a glue to hold the baby in place during its development. Leakage of this protein into vaginal discharge during these weeks could mean that your body is getting ready to deliver early.

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