What reason is pregnant woman oedema?

summary

There are many reasons for edema. The pregnancy uterus oppresses the inferior vena cava, and the venous blood flow is blocked; The hormones secreted by placenta and aldosterone secreted by adrenal gland increased, resulting in sodium and water retention in the body; What reason is pregnant woman oedema? Now let me tell you something.

What reason is pregnant woman oedema?

After pregnancy, the blood volume of pregnant women gradually increased from the 6th week of pregnancy, reached the peak at the 34th week, and maintained at this level until two weeks after delivery. Blood volume can be increased by about 40% compared with non pregnancy period, so after the increase of blood volume, interstitial fluid will also increase.

As the increase of blood, the increase of plasma is more than the increase of blood cells, so the blood components will be relatively diluted, and the relative concentration of plasma albumin is lower than that in non pregnancy. Plasma albumin is the main component to maintain plasma osmotic pressure. The plasma osmolality during pregnancy is lower than that during non pregnancy. This makes the water in the blood flow easy to penetrate into the interstitial fluid, resulting in lower limb edema.

After pregnancy, the uterus is enlarged and the pressure in pelvis is increased, which affects the venous blood flow of lower limbs. This is also one of the important causes of lower limb edema. If the edema during pregnancy is lighter after rest or sleep, it is physiological and need not be worried.

matters needing attention

If the edema is obvious and there is no remission, we should further check whether there are other pregnancy complications, timely diagnosis and treatment.