blood factor negative
/ˈblʌd ˈfaktə ˈnɛɡətˌɪv/
n
English · blood factor negative中文 · Rh阴性Español · factor RH negativoFrançais · facteur rhésus négatif
意味：Individuals not carrying the Rh molecule (antigen) are Rh negative; the Rh factor plays an important role in pregnancy (the parents’ factors must be compatible). composition of the blood