孕期检查双顶径和股骨长的标准

孕周

双顶径平均值（cm）

腹围平均值（cm）

股骨长（cm）

13

2.52+0.25

6.90+1.65

1.17+0.31

14

2.83+0.51

7.77+1.82

1.74+0.58

15

3.23+0.51

9.13+1.56

1.74+0.58

16

3.62+0.58

10.32+1.92

2.10+0.51

17

3.97+0.44

11.49+1.62

2.52+0.44

18

4.25+0.53

12.41+1.89

2.71+0.46

19

4.52+0.53

13.59+2.30

3.03+0.50

20

4.88+0.58

14.80+1.89

3.35+0.47

21

5.22+0.42

15.62+1.84

3.64+0.40

22

5.45+0.57

16.70+2.23

3.82+0.47

23

5.80+0.44

17.90+1.85

4.21+0.41

24

6.05+0.50

18.74+2.23

4.36+0.51

25

6.39+0.70

19.64+2.20

4.65+0.42

26

6.68+0.61

21.62+2.30

4.87+0.41

27

6.98+0.57

21.81+2.12

5.10+0.41

28

7.24+0.65

22.86+2.14

5.35+0.55

29

7.50+0.65

23.71+1.50

5.61+0.44

30

7.83+0.62

24.88+2.03

5.77+0.47

31

8.06+0.60

25.78+2.32

6.03+0.38

32

8.17+0.65

26.20+0.33

6.43+0.49

33

8.50+0.47

27.78+2.30

6.52+0.46

34

8.61+0.63

27.99+2.55

6.62+0.43

35

8.70+0.55

28.74+2.88

6.71+0.45

36

8.81+0.57

29.44+2.83

6.95+0.47

37

9.00+0.63

30.14+2.17

7.10+0.52

38

9.08+0.59

30.63+2.83

7.20+0.43

39

9.21+0.59

31.34+3.12

7.34+0.53

40

9.28+0.50

31.49+2.79

7.40+0.53

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