facteur rhésus négatif
/ˈblʌd ˈfaktə ˈnɛɡətˌɪv/
n
English: blood factor negative · Rh阴性
Sens：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