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Hemolytic disease of the newborn (HDN) is a disease in which there is hemolysis in a newborn or fetus caused by blood-group incompatibility between mother and child. There are a bunch of related terms: Immune hydrops (Hydrops means accumulation of edema fluid in the fetus during intrauterine growth.
This test measures the amount of fetal fibronectin (FFN). FFN is a protein made during pregnancy. It's found between the lining of your uterus and the amniotic sac that's protecting your baby.Fetal fibronectin works as a glue to hold the amniotic sac to the uterine lining.This test helps find out whether you're at risk for premature delivery. The protein is found in cervical and vaginal fluid during the first half of your pregnancy and then disappears.etal fibronectin works as a glue to hold the amniotic sac to the uterine lining. This test helps find out whether you're at risk for premature delivery. The protein is found in cervical and vaginal fluid during the first half of your pregnancy and then disappears.