Ways to prevent fainting
A 'vasovagal'
It can be normal to feel a little light headed after experiencing a normal blood loss of about 200 to 400 mls after the birth. When the woman first gets up after giving birth it is not unusual for her to feel faint, weak or shaky or to actually momentarily 'pass out'.
After losing the normal amount of blood, the blood pressure lowers and if the woman stands up too soon, the blood can drain from her head to the rest of her body causing her to feel faint. It is important in that first hour after the birth that she allows her body time to readjust to having less blood circulating around. She needs to rest and stabilise before trying to get up and do things.
If the woman has lost more blood than the normal expected blood loss, or had a low
haemoglobin blood level (anaemic due to low iron) before the labour, then fainting is more likely to occur and may persist when she sits up in bed or every time she tries to get up, for quite a few hours or even a day or more after the birth.