What are the fetal development indicators during pregnancy?

Every child is the most precious treasure in the eyes of his parents. I believe that every expectant father and mother is looking forward to the upcoming child. What are the fetal development indicators during pregnancy? I believe this must be a topic that many expectant fathers and mothers are very concerned about. The doctor has answered this question for us through the following content. Let’s take a look together.

Early pregnancy fetal development indicators

4 weeks: The fetus is only 0.2 cm. The amniotic cavity is formed just after the fertilized egg has implanted and its volume is very small. Ultrasound cannot show clear signs of pregnancy.

8 weeks: The fetus grows to 1.66 cm. The fetal shape is determined, and the head, body and limbs can be distinguished. The head is larger than the trunk. B-ultrasound shows that the gestational sac occupies about 1/2 of the uterine cavity, the fetal shape and fetal movement are clearly visible, and the yolk sac is visible.

10 weeks: The fetus grows to 2.83 cm, all fetal organs have been formed, and the rudiments of the placenta are formed. B-ultrasound shows that the gestational sac begins to disappear, a crescent-shaped placenta is visible, and the fetus is active in the amniotic fluid.

12 weeks: The fetus grows to 4.58 cm, the external genitalia begin to develop, any deformities will be revealed, and the calcification of the skull becomes more complete. The skull halo is clear, the biparietal diameter can be measured, obvious deformities can be diagnosed, and the internal organs tend to become more complete afterwards.

Second trimester fetal development indicators

13 weeks of pregnancy: The average biparietal diameter is 2.52 ± 0.25", the average abdominal circumference is 6.90 ± 1.65", and the femur length is 1.17 ± 0.31.

17 weeks of pregnancy: The average biparietal diameter is 3.97±0.44", the average abdominal circumference is 11.49±1.62", and the femur length is 2.52±0.44.

19 weeks of pregnancy: The average biparietal diameter is 4.52±0.53", the average abdominal circumference is 13.59±2.30", and the femur length is 3.03±0.50.

23 weeks of pregnancy: The average biparietal diameter is 5.80±0.44", the average abdominal circumference is 17.90±1.85", and the femur length is 4.21±0.41.

27 weeks of pregnancy: The average biparietal diameter is 6.98±0.57", the average abdominal circumference is 21.81±2.12", and the femur length is 5.10±0.41.

Normal values ​​of fetal development in late pregnancy

30 weeks of pregnancy: the average value of biparietal diameter is 7.83±0.62", the average value of abdominal circumference is 24.88±2.03", and the average value of femur length is 5.77±0.47.

33 weeks of pregnancy: the average value of biparietal diameter is 8.50±0.47", the average value of abdominal circumference is 27.78±2.30", and the average value of femur length is 6.52±0.46.

34 weeks of pregnancy: the average value of biparietal diameter is 8.61±0.63", the average value of abdominal circumference is 27.99±2.55", and the average value of femur length is 6.62±0.43.

37 weeks of pregnancy: the average value of biparietal diameter is 9.00±0.63", the average value of abdominal circumference is 30.14±2.17", and the average value of femur length is 7.10±0.52.

40 weeks of pregnancy: the average value of biparietal diameter is 9.28±0.50", the average value of abdominal circumference is 31.49±2.79", and the average value of femur length is 7.4±0.53.

The above content is a detailed introduction to the question of what are the fetal development indicators during pregnancy. Do you understand it, dear expectant fathers and mothers? If you want to know more about this, you can call the toll-free hotline at the bottom of our screen between 8 a.m. and 6 p.m. to consult our experts. I believe you will get the answers you want.