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Table 6 Gestational age assessment by femur length (FL)

From: Fetal age assessment based on 2nd trimester ultrasound in Africa and the effect of ethnicity

 

Centiles

     
 

50th

 

2.5th

 

97.5th

 

FL (mm)

weeks

days

Weeks

days

weeks

days

11

11

5

12

0

13

6

12

12

1

12

4

14

3

13

12

4

13

0

14

6

14

13

0

13

3

15

2

15

13

3

13

5

15

5

16

13

5

14

1

16

0

17

14

1

14

4

16

3

18

14

4

14

6

16

6

19

14

6

15

2

17

1

20

15

2

15

4

17

4

21

15

4

16

0

17

6

22

15

6

16

2

18

2

23

16

2

16

5

18

4

24

16

4

17

0

19

0

25

16

6

17

2

19

2

26

17

1

17

4

19

4

27

17

4

18

0

20

0

28

17

6

18

2

20

2

29

18

1

18

4

20

4

30

18

3

18

6

20

6

31

18

5

19

1

21

2

32

19

0

19

3

21

4

33

19

2

19

5

21

6

34

19

4

20

1

22

1

35

19

6

20

3

22

3

36

20

2

20

5

22

5

37

20

4

21

0

23

1

38

20

6

21

2

23

3

39

21

1

21

4

23

5

40

21

3

21

6

24

0