Is hair fortune telling accurate _ is hair fortune telling accurate?

Is it accurate for boys and girls to do hair tests?

Hair test for boys and girls: hair and rings.

Step 1: Pass the hair through the ring, with the hair on both sides as long as possible, hang up the ring and tie a knot.

Step 2: Hold the ring in your left hand and put it between the thumb and forefinger of your right hand, close to the tiger's mouth of the forefinger, not close to the skin, but not too far away. Let the ring be in a stable state, let it stand for a few seconds, and say in your heart, "Give birth to a man and a woman".

Step 3: Hold the ring above the palm of your right hand, and then you will find that the ring starts to move like an electric shock. At this time, you can judge whether it is a boy or a girl according to the movement track of the ring.

Results:

If the ring swings like a pendulum, it is a boy;

If the ring revolves around a small circle, it is a girl;

If the ring stays where it is, it is not pregnant.

Is it accurate for boys and girls to do hair tests? In fact, these are popular methods and there is no scientific explanation. So interested mothers can give it a try, but don't take this result as the basis. Again, for reference only.

Tips:

The demand for boys and girls is not very strong now. Doing this test is also fun and entertaining, as long as you have a healthy baby.

How to measure fetal sex most accurately? First, DNA blood drawing.

A gene called "SRY" exists only on the Y chromosome. Once detected, it means that the fetus is male. This test can be carried out after five weeks of pregnancy, but there is no such technical support in China.

Second, B ultrasound

On the B-ultrasound image, the male genitalia is pot-shaped and the female genitalia is petal-shaped. No matter how experienced a doctor is, there will be mistakes in identification. The accuracy of B-ultrasound is only about 85% ~ 90%, and the fetus can only be detected after 4 months.

Ultrasound is a sound wave. Up to now, it has been reported that it has no adverse effects on the fetus, so it is widely used in obstetrics and gynecology. When ultrasound is used to diagnose the sex of the fetus, the accuracy of male infants can reach more than 95%, while the reliability of female infants is only about 85%.

Third, amniocentesis

When the fetus 15 weeks old, every 1 ml amniotic fluid contains nearly ten thousand fetal cells. Take these amniotic fluid cells out and analyze the chromosomes, and you can determine the sex of the baby.

Amniocentesis is an invasive detection method, so it will be dangerous. At present, amniocentesis is mainly used to screen fetal health problems for pregnant women with family genetic history, which may cause some harm such as abortion.