It is also noteworthy that the average gestational age at birth in the present analyses was approximately 35 weeks for Rh(D)- and/or K-mediated HDFN, which is considered late preterm and might also represent that early delivery is frequently employed in the management of pregnancies at risk of fetal anemia although we were unable to extract data on this from the included studies. The gene discussed is RHD; the disease is anemia.