Level II Prenatal Ultrasound

Grade II prenatal ultrasound examination, ie color ultrasound, is used for prenatal screening of ultrasound in middle and late pregnancy. In addition to the contents of grade I prenatal ultrasound, the morphological observation of the main organs of the fetus is also performed. The inspector pulls down the trousers to expose the lower abdomen. The medical examiner applies the gel to the examination site, touches the pregnant woman's abdomen with the probe, observes the fetus through the display screen, and records the data. Basic Information Specialist classification: maternity check check classification: ultrasound Applicable gender: whether women are fasting: not fasting Tips: Empty the bladder before checking and remove the metal decoration. Normal value Normal fetal development: 13 weeks of gestation: the average value of the double top diameter is 2.52 ± 0.25 cm, the average value of the abdominal circumference is 6.90 ± 1.65 cm, and the length of the femur is 1.17 ± 0.31. 14 weeks of gestation: the average value of the double top diameter was 2.83 ± 0.57 cm, the average value of the abdominal circumference was 7.77 ± 1.82 cm, and the length of the femur was 1.38 ± 0.48. 15 weeks of gestation: the average value of the double top diameter is 3.23 ± 0.51 cm, the average value of the abdominal circumference is 9.13 ± 1.56 cm, and the length of the femur is 1.74 ± 0.58. 16 weeks of gestation: the average value of the double top diameter is 3.62 ± 0.58 cm, the average value of the abdominal circumference is 10.32 ± 1.92 cm, and the length of the femur is 2.10 ± 0.51. 17 weeks of gestation: the average value of the double top diameter is 3.97 ± 0.44 cm, the average value of the abdominal circumference is 11.49 ± 1.62 cm, and the length of the femur is 2.52 ± 0.44. 18 weeks of gestation: the average value of the double top diameter is 4.25 ± 0.53 cm, the average value of the abdominal circumference is 12.41 ± 1.89 cm, and the length of the femur is 2.71 ± 0.46. 19 weeks of gestation: the average value of the double top diameter is 4.52 ± 0.53 cm, the average value of the abdominal circumference is 13.59 ± 2.30 cm, and the length of the femur is 3.03 ± 0.50. 20 weeks of gestation; the mean value of the double top diameter was 4.88 ± 0.58 cm, the average value of the abdominal circumference was 14.80 ± 1.89 cm, and the length of the femur was 3.35 ± 0.47. 21 weeks of gestation: the average value of the double top diameter is 5.22 ± 0.42 cm, the average value of the abdominal circumference is 15.62 ± 1.84 cm, and the length of the femur is 3.64 ± 0.40. 22 weeks gestation: the average value of the double top diameter is 5.45 ± 0.57 cm, the average value of the abdominal circumference is 16.70 ± 2.23 cm, and the length of the femur is 3.82 ± 0.47. At 23 weeks of gestation: the mean value of the double top diameter was 5.80 ± 0.44 cm, the average value of the abdominal circumference was 17.90 ± 1.85 cm, and the length of the femur was 4.21 ± 0.41. 24 weeks gestation: the average value of the double top diameter is 6.05 ± 0.50 cm, the average value of the abdominal circumference is 18.74 ± 2.23 cm, and the length of the femur is 4.36 ± 0.51. 25 weeks of gestation: the average value of the double top diameter is 6.39 ± 0.70 cm, the average value of the abdominal circumference is 19.64 ± 2.20 cm, and the length of the femur is 4.65 ± 0.42. 26 weeks gestation: the average value of the double top diameter is 6.68 ± 0.61 cm, the average value of the abdominal circumference is 21.62 ± 2.30 cm, and the length of the femur is 4.87 ± 0.41. 27 weeks gestation: the average value of the double top diameter is 6.98 ± 0.57 cm, the average value of the abdominal circumference is 21.81 ± 2.12 cm, and the length of the femur is 5.10 ± 0.41. At 28 weeks of gestation: the average value of the double top diameter is 7.24 ± 0.15 cm, the average value of the abdominal circumference is 22.86 ± 2.41 cm, and the length of the femur is 5.35 ± 0.55. 29 weeks of gestation: the mean value of the double top diameter is 7.50 ± 0.65, the average value of the abdominal circumference is 23.71 ± 1.50 cm, and the average length of the femur is 5.61 ± 0.44. 30 weeks gestation: the average value of the double top diameter is 7.83 ± 0.62 cm, the average value of the abdominal circumference is 24.88 ± 2.03 cm, and the average length of the femur is 5.77 ± 0.47. 31 weeks gestation: the average value of the double top diameter is 8.06 ± 0.60 cm, the average value of the abdominal circumference is 25.78 ± 2.32 cm, and the average length of the femur is 6.03 ± 0.38. 32 weeks gestation: the average value of the double top diameter was 8.17 ± 0.65 cm, the average value of the abdominal circumference was 26.20 ± 2.33 cm, and the average length of the femur was 6.43 ± 0.49. 33 weeks gestation: the average value of the double top diameter was 8.50 ± 0.47 cm, the average value of the abdominal circumference was 27.78: ± 2.30 cm, and the average length of the femur was 6.42 ± 0.46. 34 weeks gestation: the average value of the double top diameter is 8.61 ± 0.63 cm, the average value of the abdominal circumference is 27.99 ± 2.55 cm, and the average length of the femur is 6.62 ± 0.43. 35 weeks of gestation: the average value of the double top diameter is 8.70 ± 0.55 cm, the average value of the abdominal circumference is 28.74 ± 2.88 cm, and the average length of the femur is 6.71 ± 0.45. 36 weeks gestation: the average value of the double top diameter is 8.81 ± 0.57 cm, the average value of the abdominal circumference is 29.44 ± 2.83 cm, and the average length of the femur is 6.95 ± 0.47. 37 weeks gestation: the average value of the double top diameter is 9.00 ± 0.63 cm, the average value of the abdominal circumference is: 30.14 ± 2017 cm, and the average length of the femur is 7.10 ± 0.52. 38 weeks of pregnancy: the average value of the double top diameter is 9.08 ± 0.59 cm, the average value of the abdominal circumference is: 30.63 ± 2.83 cm, and the average length of the femur is 7.20 ± 0.43. 39 weeks of gestation: the average value of the double top diameter was 9.21 ± 0.59 cm, the average value of the abdominal circumference was 31.34 ± 3.12 cm, and the average length of the femur was 7.34 ± 0.5. 40 weeks of pregnancy: the average value of the double top diameter is 9.28 ± 0.50 cm, the average value of the abdominal circumference is 31.49 ± 2.79 cm, and the average length of the femur is 7.4 ± 0.53. Clinical significance Abnormal results: Developmental malformations of the nervous system, face and cardiovascular. Hydrocephalus may cause brain tissue to develop. Long-term massive pleural effusion in fetal pleural effusion can cause fetal lung dysplasia. Microcephaly. Fetal cleft lip. Fetal gastrointestinal malformations. Down syndrome neck transparent belt, short femur, fifth middle finger missing, outer ear length is smaller than normal fetus. Fetal heart malformation. People who need to be examined: women in the middle and late pregnancy. Precautions Before the test: Empty the bladder and remove the metal decoration. When checking: Relax and actively cooperate with the doctor. Inspection process The inspector pulls down the trousers to expose the lower abdomen. The medical examiner applies the gel to the examination site, touches the pregnant woman's abdomen with the probe, observes the fetus through the display screen, and records the data. Not suitable for the crowd Generally no taboos. Adverse reactions and risks Generally not.

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