In fact, there are a lot of data about men and women from the list of malformations, including biparietal diameter, fetal heart rate, femur length, fetal movement, etc. Pregnant mothers can judge men and women by these data, and the specific methods are as follows:
1. Look directly at the face
If the doctor takes a positive photo, it is actually easy to judge whether it is a male treasure or a female treasure, and the contours of a male baby and a female baby are obviously different. If the genitals can be photographed,
2. Double zenith diameter and femoral head length
Subtract the data of femoral head detection from the data of double zenith diameter. If this value is greater than 2.1, it is a greater chance for boys; If the value is less than 2.1, then the child is more likely to be a girl; If it is just equal to 2.1, it is not easy to distinguish for the time being, so you can check it again after a while.
3. Bilateral renal pelvis
If there is no obvious separation of bilateral renal pelvis on the results of four-dimensional color Doppler ultrasound, then it is a female baby with a high probability; If it is obvious separation, then there is a high probability that it is a male baby. This is the most easy data to judge whether there are boys or girls. If you have a big abnormality, the expectant mother can carefully find the words "separation of renal pelvis" or "no obvious separation of renal pelvis" on the B-ultrasound list.
4. Fetal heart rate
There is a folk saying that if the fetal heart rate is less than 14 beats/min, the fetus is a boy. Generally speaking, girls' heart rate is higher than that of boys, which is only true at birth, and has nothing to do with the sex of the fetus. The speed of heart rate only changes with the gestational age.