Fibrin/fibrinogen degradation products in late pregnancy promote macrosomia prediction in normal uncomplicated pregnancy.

OBJECTIVE: The purpose of this study was to explore the association of fibrin/fibrinogen degradation products (FDP) levels with the risk of macrosomia, and determine whether FDP, either alone or combined with traditional factors in late pregnancy, could be used to predict macrosomia at birth in healthy pregnancies. METHODS: A total of 9464 health pregnant women with singleton pregnancy were recruited in this retrospective cohort study. Maternal plasma FDP levels at hospital admission and birth outcomes were obtained from laboratory system and hospital records, respectively. RESULTS: FDP levels in late pregnancy were significant higher in women who delivered macrosomia than those who delivered infants with normal weight [median (interquartile range, IQR): 8.2 (5.8-11.9) vs. 6.6 (4.7-9.6) mg/L; P < 0.001]. Multivariable logistic regression analysis demonstrated that FDP levels were independently associated with macrosomia risk. Pregnant women in the highest quartile of FDP had a 2.99-fold higher risk of delivering macrosomia compared with those in the lowest (adjusted OR: 2.99; 95% CI: 2.27-3.93). In addition, the incorporation of FDP into the crude prediction model significantly improved the area under curve (AUC) for predicting macrosomia (0.774 vs. 0.787; P < 0.001). CONCLUSION: Our findings suggest that maternal plasma FDP levels in late pregnancy are independently and significantly associated with risk of macrosomia. Combination of FDP levels and traditional risk factors could promote the prediction of macrosomia.