Is it related to Feng Shui to have boys and girls? From the perspective of feng shui, what affects boys and girls is whether a house is [four positive]. But scientific research shows that having boys and girls has nothing to do with Feng Shui. There are 23 pairs of 46 chromosomes in human cells. Comparing the chromosomes of men and women, it is found that 22 pairs (44 chromosomes) of men and women are the same. These identical chromosomes are called. Autologous chromosome? . The remaining pair is a very special chromosome, and the male and female chromosomes are combined in different ways.
This special pair of chromosomes owned by women consists of two X chromosomes. This pair of male chromosomes consists of an X chromosome and a Y chromosome. The size of the Y chromosome is very small, about one third of that of the X chromosome. The XY chromosome is called. Sex chromosome? . Such a small difference in chromosome combination makes us different genders.
Newborns have 23 chromosomes from their mothers and 23 chromosomes from their fathers, which means that eggs and sperm provide 22 autosomes and 1 sex chromosomes respectively. Since the mother can only provide the X chromosome, the Y chromosome is obtained from the father. Therefore, it is not the mother but the father who decides the sex of the child. Sperm has half sex chromosome X and half sex chromosome Y, which determines the sex of future children at the moment when sperm and egg combine. Therefore, the combination of two X chromosomes or one X chromosome and one Y chromosome cannot be controlled artificially.
Judging whether the sex is a boy or a girl from the fetal heart rate is more accurate than other characteristics, which has certain scientific basis. Because men's heart rate is slower than women's, it is generally difficult for women to control their emotions when they are angry!
Generally, the heart rate is about 140 beats/min at more than 5 prenatal examinations, especially those below 140 beats/min are generally boys, and about 150 beats/min, especially those above 150 beats/min are the majority, in the third trimester (after 7 and a half months)
Why can't we judge the sex by the fetal heart rate once or twice? Because sometimes a female fetus just falls asleep after listening to the fetal heart rate, the fetal heart rate will be lower than that in her normal state, and sometimes a male fetus just moves in her mother's stomach when the doctor measures the fetal heart rate, so the fetal heart rate will be higher than that in his normal state, even exceeding 145 beats/minute. Therefore, it is necessary to have multiple fetal examination reports of expectant mothers to roughly judge gender.
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