Normal human body cells have 23 pairs of chromosomes in their nuclei. 22 pairs of them are autosomes, and onlyone pair of sex chromosomes determines gender. Sex chromosomes are divided into two types: X chromosome and Y chromosome. The sex chromosomes in male somatic cells are X and Y, which is the XY type; the sex chromosomes in female somatic cells are both X, which is the XX type.
Sperm and eggs contain half the number of chromosomes as body cells, that is, 23 chromosomes. Women produce eggs with only one X-bearing sex chromosome. The sperm produced by men has two types of chromosomes, half with X chromosomes and half with Y chromosomes. When a sperm carrying an X chromosome combines with an egg, the fertilized egg will have XX sex chromosomes, and it will be a female fetus. The sperm carrying the Y chromosome combines with the egg, and the fertilized egg has XY sex chromosomes, which is a male fetus. There can be hundreds of millions of sperm produced in one ejaculation.Whether the sperm with X chromosome or the sperm with Y chromosome combines with the egg is completely accidental and a choice of nature.
The term “sour son and spicy girl” is unscientific
There is a popular saying among the people about “sour son and spicy girl”. In fact, this kind of There is no scientific basis for this statement and must not be believed.
The gender of the fetus is completely random and does not depend on human will. The gender of the fetus is determined the moment the egg is fertilized. No matter how much Chinese medicine or Western medicine the pregnant woman takes, or asks a \”master\” to change the fetus, it will not help. It will only affect the health of the mother and child.
After pregnancy, trophoblast cells secrete chorionic gonadotropin (HCG), which inhibits gastric acid secretion, reducing gastric acid secretion in pregnant women and reducing the activity of various digestive enzymes, affecting digestive function. Eating acidic foods can stimulate the gastric secretory glands, increase gastric juice, increase gastric acid activity, facilitate digestion, and relieve indigestion symptoms. Therefore, it is beneficial for pregnant women to eat fruits such as oranges and plums appropriately. However, if you believe in the superstition about \”sour children and spicy women\” and eat too much sour and spicy food, it will damage the body and even be harmful to the fetus.
This article is provided by Baidu Reading and is excerpted from \”Three Months Before Pregnancy – Pregnancy Preparation Period\” Author: Wang Liru