产后出血的定义正确的是 A.
胎儿娩出24h内,阴道分娩者出血量≥400ml B.
胎儿娩出24h内,阴道分娩者出血量≥500ml C.
胎儿娩出12h内,阴道分娩者出血量≥400ml D.
胎儿娩出12h内,阴道分娩者出血量≥500ml E.
胎儿娩出12h内,剖宫产分娩者出血量≥1000ml