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1.Blood volume: immediately after birth averages about 300ml. (75mL additional blood from umbilical cord â if itâs still attached) But the fluid is lost into the neonateâs tissue spaces again - 300mL maintained. 2.Cardiac Output: in average 500ml/min.
Bleeding after birth guide: What to expect. Some bleeding after birth is completely normal. Here we outline what typically happens in terms of blood loss in the weeks after giving birth, including the passing of clots. After having a baby, most women will experience some blood loss from their uterus (womb) until the lining is renewed.