In the study, NIFG was used to analyze the parental inheritance of the fetus in 17 families with different monogenic disorders, including X-linked recessive disorders (Hemophilia A, Duchenne muscular dystrophy, hyper-IgM type 1), autosomal recessive disorders (glutaric acidemia type I, Nagashima-type palmoplantar keratosis and Von Willebrand disease type 3) and autosomal dominant disorder (Familial exudative vitreoretinopathy). Here, CD40LG is linked to Familial exudative vitreoretinopathy.