What Causes Hypervolemia?

Pregnancy

Pregnancy causes a seemingly innumerable number of changes within a woman's body, and fluid retention is just one of them. This is typically due to the intense hormonal changes that occur during the gestational period. During this time, the body increases its cardiac output, which causes the volume of blood being moved to increase dramatically. This in and of itself causes a mild hypervolemic effect, but expectant mothers are typically protected from the bad side effects through hemodilution, which masks significant blood losses. Hypervolemia actually prepares the pregnant woman's body for childbirth so fewer red blood cells are lost during the process, especially in the case of hemorrhage.

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