A more accurate way to predict men and women. How many predictions have you heard about men and women?

Hot and sour girl, this should be the most common rumor that everyone has heard. Even when my sister-in-law was just pregnant, my mother was very concerned about whether her sister-in-law liked sour or spicy food. As a result, my sister-in-law loved to eat "hot and sour powder" at the beginning of pregnancy, so my mother had no choice but to give up guessing. It made me laugh at my mother for a long time. So, is there any scientific basis?

First of all, everyone has different tastes. Some people don't like to eat sour or spicy food since childhood. Is this person destined to have a daughter or son from an early age? Obviously, this theory is untenable.

Secondly, it is true that some women like to eat sour or spicy food after pregnancy, but to sum up, it has little to do with the ultimate son or daughter.

From a medical point of view, in the early pregnancy, due to the fluctuation of hormones and the decrease of gastric acid secretion, many women will have symptoms such as loss of appetite, anorexia and nausea. Eating some sour food at this time may alleviate the symptoms of nausea and vomiting in the first trimester, and eating spicy and heavy food properly can * * * taste buds and increase appetite.

As for whether you like to eat sour or spicy food, it mainly depends on the eating habits of pregnant women in daily life, which is not directly related to the sex of the fetus in the abdomen.

Thirdly, from a biological point of view, the birth of boys and girls is determined by chromosomes. The sex of the fetus depends on whether the * * * combined with the egg carries the X or Y gene.

When a * * *, * * can reach hundreds of millions. The combination of * * * carrying X or Y with the egg is completely accidental, which belongs to the problem of opportunity and is not controlled by parents' will, that is to say, the chromosome has been fixed during the embryo formation.

When you know that you are pregnant, the sex of the fetus has been formed, and whether you eat sour or spicy food, it will not cause genetic variation.

From this perspective, sour children and hot women may be just a fallacy, so far, there is no absolute scientific basis.

Nausea and vomiting in the early morning of pregnancy is called "bad luck", which is one of the important signs for many women to judge early pregnancy in the past.

The main causes of nausea and vomiting in early pregnancy are the rapid increase of estrogen and progesterone in the body and the increase of HCG level in the blood, which affects the gastrointestinal peristalsis of expectant mothers, leads to the decrease of gastric acid secretion and the prolonged gastric emptying time.

The severity of early pregnancy reaction is related to many factors, such as the hormone level in the expectant mother, the physical quality of the expectant mother, and the mental state of the expectant mother.

Generally speaking, the symptoms of nausea and vomiting in the first trimester will be aggravated by being young or old, having twins or multiple births, and being afraid or bored by pregnant women.

No matter whether it is a boy or a girl, HCG in the body doubles every other day in the early pregnancy and reaches the peak at 8- 10 weeks of pregnancy.

No medical research shows that there is a significant difference in HCG in the blood of pregnant women caused by male and female fetuses. Therefore, the severity of early pregnancy reaction has no obvious relationship with the sex of the fetus in the abdomen.

With the development of pregnancy, intrauterine gestational sac can be seen by B-ultrasound in early pregnancy, and three diameters of gestational sac can be measured. The medical purpose of measuring the gestational sac size is to judge whether the embryo development is consistent with the gestational age, so as to correct the expected date of delivery as soon as possible.

But now it is used by people to judge gender, and it is widely rumored that "the gestational sac is male and round is female". To be honest, I don't know how people come to this conclusion through reasoning and evolution, but from a medical point of view, it is actually easy to overturn this conclusion.

There are human factors in the three diameters of gestational sac measured by B-ultrasound to some extent, and the techniques and measurement methods of doctors who do B-ultrasound directly affect the shape of gestational sac to some extent.

That is to say, the gestational sac size measured by a doctor may be16 *16 *17mm for the same pregnant woman and15 *18 *16mm for another doctor.

Will the sex of the fetus in the abdomen change because of the difference of B-ultrasound doctors? Obviously, this statement is untenable.

A man with a pointed belly and a woman with a round belly. Perhaps, you have heard some old people tell you that if you are pregnant with a boy, your stomach will be sharp after pregnancy, and vice versa. So, what's the medical explanation?

What we usually call abdominal characteristics is medically called "abdominal type". The "belly shape" of expectant mothers is not only related to the female body shape, fetal size, amniotic fluid volume, fetal position and other factors, but also related to the shape of maternal pelvis.

Pelvis is the bone connection between trunk and lower limbs, and it is an important structure to support trunk and protect pelvic organs. The female pelvis is also an essential bony birth canal for fetal delivery, and its size and shape are closely related to delivery.

Usually, women's pelvis is wider and shallower than men's, which is beneficial to the delivery of the fetus. Female pelvis can be divided into female type, flat type, ape type and male type. When the pregnant woman is short or the pelvis is flat or male, because the pelvis is shallow, the pregnant woman's abdomen bulges sharply, and even there is "hanging abdomen".

This is a pathological form in medicine, which has no direct relationship with the sex of the fetus in the abdomen.

In addition, normal fetuses are "vertical" in the mother's body, and some fetuses are "horizontal", so in this case, the pregnant woman's stomach does not look very sharp;

Pregnant women with more amniotic fluid or a larger fetus will have a more bulging and "round" abdomen. These circumstances do not mean that pregnant women are pregnant with daughters.

If the taste is different from that of the first child, the sex is definitely different. Expectant mothers who are pregnant with a second child often ask, doctor, I didn't like sweets (or other flavors) when I was pregnant with my first child, but now I especially like them. Does this mean that the gender of this child must be different from that of the last child?

In fact, with the growth of age, eating habits and tastes will gradually change, and there may be temporary taste changes in the early pregnancy due to hormonal fluctuations and other factors.

At present, no medical research shows that there is a clear relationship between fetal sex and taste.

In recent years, the map of Qing Palace is very popular on the Internet, because it is often asked by patients or friends, so I specially went online to Baidu to have a look. The picture of the Qing palace is to calculate the sex of the fetus according to the imaginary age of the mother and the month of pregnancy.

How on earth did you get it? I don't know how to do it. However, different websites actually have different versions of the Qing Palace map, and I don't know which one should prevail.

Just like China's "fortune teller", although there is no absolute scientific basis, China people are superstitious and worship, and they are in awe of China's traditional ideas. I dare not expect anything here, dare not criticize easily, and I can't say from a medical point of view how she has no scientific basis.

However, a very simple truth is that giving birth to a child is a matter for both men and women. Giving birth to a boy and a girl depends on whether the genetic material contributed by the father is "X" or "Y", and the map of the Qing Dynasty doesn't even have information about the father, so it is a bit far-fetched.

In addition, there are many online and folk prediction methods, such as women's weight gain during pregnancy, navel bump, fetal movement is left or right, and so on. So I won't list them here, and they are broken one by one.

To tell the truth, except for DNA testing and what the child saw with his own eyes after birth (except for a few true and false hermaphroditism, of course), even the B-ultrasound examination has errors, and all the methods for predicting men and women have no absolute scientific basis. Many times, it's just a topic that people talk about after dinner.

Because listening to the so-called method of predicting men and women, it is irresponsible for expectant mothers to easily choose abortion or induced labor to terminate pregnancy. In fact, whether it is a boy or a girl, as long as they are healthy, it is actually a gift from heaven and a fate. If you stay with children for a long time, you will have feelings. Cultivate and educate them well, boys and girls alike!