What reason is oedema during pregnancy?

summary

Many pregnant women in pregnancy, late found their legs thick, feet are also some big. In fact, this is not because pregnant women gain weight, but because of edema during pregnancy. During pregnancy, edema of pregnant women's lower limbs is a very common and normal physiological phenomenon. Edema is caused by the exudation of liquid components in blood vessels and accumulation in tissue space. First appeared in the lowest part of the human body, ankle, after rest a little back, gradually aggravated and upward spread. What reason is oedema during pregnancy? Let's talk about it

What reason is oedema during pregnancy?

1. 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. The above reasons are normal. However, if the edema is obvious and there is no remission, we should further check whether there are other pregnancy complications, timely diagnosis and treatment.

matters needing attention

Pregnancy edema needs more bed rest, and properly raising the lower limbs, especially the left lateral position, can improve the blood supply of placenta and reduce the edema; At the same time, salt should be restricted. In addition, walking is also very important, because walking, through the regulation of calf muscles, can change some venous compression phenomenon.