Edema and congestion normally develop in many tissues during pregnancy due to:

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Edema and congestion occur during pregnancy due to increased blood volume. As pregnancy progresses, the volume of blood in the body increases to nourish the growing fetus, leading to an increase in hydrostatic pressure in the blood vessels. This increased pressure can cause fluid to leak out of the blood vessels and into the tissues, resulting in swelling and edema.

Edema and Congestion Normally Develop in Many Tissues During Pregnancy