HC is the abbreviation of female head circumference in color Doppler ultrasound examination. Color Doppler ultrasound during pregnancy can effectively judge the growth and development of the fetus, and the size of the head circumference can judge whether the fetal age and physical development are normal, which is the main index of fetal development.
In the second and third trimester of pregnancy, its measurement significance is more accurate than that of biparietal diameter. The size of head circumference can reflect some pathological conditions, such as macrosomia and microcephaly. It can also reflect the neural tube malformation of the fetus, such as severe hydrocephalus and space occupation in the fetus, which can be indirectly reflected by the size of the head circumference.
Pregnant women need regular prenatal examination and color Doppler ultrasound at every stage of pregnancy. HC in color Doppler ultrasound represents the fetal head circumference at this stage, which is an important index of fetal physical development. Combined with other indexes, HC can be used to calculate the fetal height and weight.
The range of fetal head circumference at each stage is normal. If the head circumference is within the normal range when checking, or there is not much difference, most of them are normal.
The meaning of HC in different fields
1, video resources
Hc means image quality, HighDefinitionCamera, which means high definition video version, which is also commonly known as "high definition gun version".
2. Building hc
Refers to the section size of beams and columns. Highcontainer is translated as a kind of high cabinet and container. It can also be HQ. The internal volume is11.8 m x 2.35 m x 2.69 m, the gross weight of distribution is generally 30 tons, and the volume is 74 cubic meters.
3. Automobile industry
Hc is the abbreviation of hydrocarbon, which is one of the pollutants emitted by automobiles.
4. Tiger pounce sports
HoopChina- Huyue Sports, referred to as HC Huyue NBA Chinese website, is a professional basketball website focusing on original NBA news, pictures, the most comprehensive NBA live broadcast, video, data analysis and other in-depth content, including NBA, CBA, street basketball, basketball shoes and equipment, battles, competitions and so on. The community with good atmosphere has all NBA team forums, such as NBA James Heat, Jeremy Lin and Kobe Lakers.