Is fortune telling in Taobao really accurate? Someone did the math.

Not reliable! It's all fake! Is to cheat you of your money! Fool you! Do not believe! Taobao always gives the goods before paying for things! Sign when you see something, and then pay! If I let you pay first, you must be a liar! Don't trust him! Be careful! Hope to adopt! Thank you! Give you something useful! Look at that! Down there! It will help you get married in the future! Look at that! Hope to adopt! Thank you very much

Too early! If you don't do this, you can't learn well! I won't! How can you get pregnant with a kiss! If one kiss can get pregnant! Men and women don't use that anymore! That's easy!

Students nowadays should take learning as the standard! You shouldn't think about anything else! It will affect your study! You are all young now, and you will have plenty of time in the future! Don't be too precocious, it's not good for yourself and her! Premature sex is not good for herself and her health! Especially for girls' bodies! It is harmful to do it before a girl is 20 years old and her body is not mature! Besides, how can you marry your girlfriend after what you have done to her now? This is not a curse on her! Unless you can marry her later! Who else can have her! Beast! Ahem! If you get married in the future, let others know what to think of you! Doing so is the most harmful to girls! If you get married in the future, you have plenty of time to do it with your wife!

Abortion is very harmful to women. Keep doing it, and the chances of getting pregnant in the future will be small!

You are still students! How big it is! How come men and women are so precocious now! Alas! Precocity is not good for girls! The body is not well developed!

There is nothing that no one doesn't like to do, but you must have enough ability to win each other's favor before you can do that with your boyfriend or girlfriend! To err is human. Men and women all have sexual desire. Otherwise, what are men and women doing in the world? It's just that some people are curious about sex, precocious and do it early without getting married. Some people don't quite understand that it's too late to get married! Animals grow up in high temperature, so do animals, not to mention people! It's best for men and women to get married before they do it, and don't be too premature. This is loyalty to each other and responsibility to themselves! This is a good man and a good woman! Everyone makes mistakes, as long as they are corrected in time, don't make mistakes again! Trust each other when you get married, and don't be ambiguous! Stop fooling around! Is a good man! People's precocity is also harmful to people, because they do that before their bodies are mature, especially girls! People should study hard at an early age, get into a good university in the future, find a good job, find a good partner and have sex with their lover every day after marriage! It is best not to think about things that affect learning between men and women before the age of 20! Studying hard is what young people should do! There is plenty of time to get married and love that after 20 years old!

Calculation method of female physiological cycle;

The calculation method of female physiological cycle is what every female friend wants to know, so what do you want to know about the calculation method of female physiological cycle? Please see the introduction below.

Calculation method of women's physiological cycle: The date of ovulation of women is generally around 14 days before the next menstruation. The ovulation date is calculated from 1 day of the next menstrual period, and from the countdown to 14 day or negative 14 day. The ovulation date, the first 5 days and the last 4 days are called ovulation period together. For example, anonymous's menstrual cycle is 28 days, and the 1 day of this menstrual cramp is 65438+February 2nd, so the next menstrual cramp is 65438+February 30th (65438+February 2nd plus 28 days), and then subtract14th day from 65438+February 30th, then Ovulation day, the first 5 days and the last 4 days, that is, 65438+February 1 1-20, is the ovulation period. Except the menstrual period and ovulation period, the rest of the time is a safe period. You don't have to use any birth control pills and birth control pills during safe sexual intercourse.

Chromosome:

It is a mystery to have boys and girls, but this mystery is not determined by fate, but by both men and women. Generally speaking, in the absence of artificial selection, the birth sex ratio is 1: 1. Fetal sex is determined by sex chromosome, YX stands for male and XX stands for female. There are 23 pairs of chromosomes in human body, 22 pairs are autosomes, and 1 pair is sex chromosomes. Chromosome 23 pairs of chromosomes. Why do some people give birth to girls when they want boys, while others give birth to boys when they need girls? What happened to boys and girls? Since ancient times, there have been various speculations about this, but there is no scientific basis.

It was not until the early 20th century that scientists discovered chromosomes in human cells that the mystery of sex was revealed. It turns out that the birth of a boy and a girl is determined by a pair of sex chromosomes in a fertilized egg.

There are 23 pairs of chromosomes carrying genetic material in human somatic cells, of which 22 pairs are autosomes, all the genes contained in the 23 pairs are genetic information, and 1 pair is a sex chromosome, which determines the sex of the fetus. The types of trait genes contained in autosomes are the same for men and women, and there is no gender difference. Sex chromosomes are different. The male 1 sex chromosome consists of X chromosome and Y chromosome (the male genome becomes 22+XY), while the female 1 sex chromosome is X chromosome (the female genome becomes 22+XX). Half of the 23 pairs of chromosomes come from the father and the other half from the mother.

Human germ cells reproduce through meiosis, that is, 1 cell is divided into two, two cells are divided into four, and so on. In the process of immature germ cells developing into mature germ cells, the chromosomes in the cells undergo two divisions, and the last one is meiosis, that is, mature sperm or egg cells contain only 23 chromosomes, which is half of the original, of which 22 are autosomes, and 1 is a sex chromosome. The male sex chromosome 1 is XY, so one kind of sperm with X sex chromosome is called X sperm, and the other kind with Y sex chromosome is called Y sperm. The female sex chromosome 1 is XX, so all the eggs after division and maturation contain 1 sex chromosome. Therefore, there are two kinds of male sperm, while there are only 1 kind of female eggs. So having boys and girls depends on the type of male sperm cells.