What is the most accurate feature of having boys and girls?

There are more than 30 opinions about having boys and girls. These opinions are pointed-bellied men, round-bellied women, low-bellied men and pregnant women. The ugly and black expectant mother is a man, and the unchanged or beautiful one is a woman. Most of them are the opinions of the older generation, without much scientific basis. Don't believe it all. I heard that the characteristics of boys and girls are super accurate. What are these characteristics? In fact, most of these characteristics are the opinions of the older generation. Although there is no scientific basis, it is still drawn from experience. Today, we will collect the characteristics of these boys and girls for everyone, hoping to help curious parents find out. What are the characteristics of boys and girls that are too accurate? 1. The clear palace table is supposed to be a man and a woman (the secret recipe table for boys and girls born in the clear palace is calculated according to the lunar calendar, and the pregnant month with menstrual cycle exceeding 28 days is postponed for one month, and it is not necessary for those with irregular menstruation); 2, pointed belly male, round belly female; 3, the stomach is small and the stomach is big; 4. Men who are not fat except for their stomachs, and vice versa; 5, the foot is not swollen, slightly swollen in the later stage, swollen in the foot, and swollen in the later stage; 6, the reaction is not heavy male, and the reaction is heavy female; 7. Quasi-MM likes sour and salty men and women who like spicy or sweet food and juice; 8, quasi-MM becomes ugly, the skin turns black male, and the skin remains unchanged or becomes beautiful female; 9. Fetal movement is early in males (16W) and late in females; 10, the fetal movement feels that punching and kicking turns the whole body into a male and only turns the whole body into a female; 1 1, boys are born earlier than the expected date of delivery, and girls are born later; 12, navel protruding male, not protruding female; 13, B-ultrasound showed that the baby's face was facing the male and the female with the MM; 14, pregnancy line stays above the navel, straight and thin, straight between the breasts, and the whole of pregnancy line is male, and vice versa; 15, the quasi-MM has stronger sexual desire after pregnancy, and she is a male, and her sexual desire has not changed or weakened. 16, fetal movement to the left male, right female; 17, fetal heart 140 male, 150 female; 18, pregnant quasi-MM hardworking, good mental state male, lazy, poor mental state female; 19, quasi-MM male nose is bigger, female remains the same; 20, quasi-MM urine test early and late alkaline (more than 6, 5) men, acidic (less than 6) women; 2 1, amniotic fluid is mostly female, and amniotic fluid is less male; 22, on the stomach-female; Degenerate-male; 23, rapid breast development after pregnancy-female; Conversely-male; 24, DD is large in the early stage, indicating that it is a woman in the early stage of pregnancy, and the stomach is not big in the early stage, indicating that it is a man in the late stage of pregnancy; 25. The anterior wall of placenta is male and the posterior wall is female; 26, underarm black is a woman, not black is a man; 27, quasi-MM can eat men, not women; 28, areola is small, RT is a black woman, areola is big, RT is not a black man; 29. Looking from the back in the third trimester, you can't see pregnancy, and your movements are very light, flexible, heavy and slow; 30, the abdomen is soft, and the abdomen is just male; 3 1, the fetal heart is like a horseshoe and strong, male, like gongs and drums but not strong, with little strength, female; 32, waist thick female, waist change small male; 33. The strong pulse on the left side is male and the strong pulse on the right side is female (it can only be detected after more than 3 months of pregnancy); 34. How to determine the sex of the fetus by hanging a pencil (find a pencil with a rubber at one end, and stick a needle tied with a thread at the rubber end, so that you can hold the thread and lift the pencil, with the nib pointing vertically down, and then aim it at the vein of your wrist). The nib moves vertically (that is, the swinging direction of the nib is the same as that of the arm). For men, the nib moves horizontally (that is, for women, the swinging direction of the nib is perpendicular to the arm), and the nib does. 35. Drop two drops of medical alcohol into the urine of pregnant women for the first time in the morning. It is men who turn red, but women who remain unchanged; 36. I am afraid of giving birth to girls in the early morning of pregnancy, otherwise it is a boy; 37. Inadvertently, count the number of eggs in the refrigerator, odd for boys and even for girls; 38. There is also a formula: (the cardinal number will never change)+lunar month when pregnant-imaginary age when pregnant+19=z z (if it is even) = girl z (if it is odd) = it mainly depends on the male who gives birth to boys and girls, because the sex of human beings is determined by sperm at the moment of fertilization, while eggs are passive and neutral. Whether a fertilized egg develops into a male fetus or a female fetus depends on whether the sperm that first binds to the egg is Y-type or X-type. X-type sperm and Y-type sperm are easy to combine with eggs, that is, the possibility of giving birth to boys and girls is 50% respectively. However, because the combination probability of Y-type sperm and egg is more than that of X-type sperm and egg. Therefore, from the whole human being, the special ratio of male and female births is 52: 48; In other words, 106 boys were born when 100 girls were born. Why is there no imbalance between men and women? This is because boys die earlier than girls. So when you are about twenty years old, the ratio of male to female population will be basically balanced. This is really a clever arrangement of nature.