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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.
Skin changes are common during pregnancy. One of the first changes you may notice is the circle of skin round your nipples (areolas) getting darker. This can happen from about eight weeks. You may also find that the bumps around your nipples become more pronounced, and your nipples more erect.