Pregnancy, heavy legs is a physiological process that consists of the development of a fertilized ovum in the mother's body and turning into a mature fetus. It begins with the union (fertilization) of a mature egg cell with a male germ cell in a woman's ovary and lasts an average of 280 days, i.e. 10 lunar months.
Fertilization occurs in the uterine tube. The fertilized ovum is pushed towards the uterine cavity due to the worm-like contraction of the fallopian tube, at this time it is covered with soft hairs (villi) and turns into a multicellular embryo, which is attached to the mucous membrane of the fallopian tube with the help of those hairs. From this time, the fetus begins to form, and the function of some systems in the woman's body changes accordingly. At the place where the embryo is attached to the uterus, hairs grow a lot, and from them the placenta, a component of the placenta, is formed, which is connected to the fetus through the umbilical cord. Through the umbilical blood vessels, through the placenta, nutrients, oxygen and nitrogen from the mother's body come to the fetus, and metabolic products from the fetus leave.
During pregnancy, various functional changes occur in a woman's body, creating favorable conditions for the good development of the fetus. During this period, the function of the central nervous system changes somewhat, as a result, the excitability of the spinal cord decreases, which leads to the relaxation of the uterine muscles and its relaxation.
The corpus luteum and the placenta formed during pregnancy produce the hormones necessary for the birth of the fetus; Under the influence of other hormones produced by the placenta, the mammary glands enlarge, and when H. reaches the end, colostrum begins to flow from it, and milk begins to flow during the chilla period. Many changes also occur in the uterus: it grows both in length and in width, and the large and small blood vessels that bring blood to the placenta increase dramatically. A woman breathes more deeply, which ensures that the blood is more saturated with oxygen. The contractility of the heart increases significantly, as a result of which oxygenated blood is delivered faster to the vital organs of a woman, including the uterus. Kidneys also work hard, not only in the mother's body, but it also separates metabolic products that appear in the fetus. The formation of erythrocytes in the umbilicus accelerates, that is, the amount of blood increases, blood vessels expand, and gas exchange increases. Therefore, in order to ensure the normal functioning of organs and systems in the body of a pregnant woman, and to create favorable conditions for the development of the fetus, there should be a lot of nutrients and oxygen. The condition and behavior of the pregnant woman largely determines the normal course of H., how the fetus will develop and the health of the future child. A pregnant woman suffering from any disease (influenza, tuberculosis, rheumatism, angina, diabetes, anemia, liver, kidney, heart disease, etc.), improper diet, violation of daily routine,
