Occipito Frontal Diameter

Kurmanavicius J et.al. Br J Obstet Gynaecol 1999;106:126-135

 

GA

(wks)

5th

Percentile

50th

Percentile

95th Percentile

12

20.2

24.6

29.1

13

24.9

29.6

34.3

14

29.6

34.5

39.4

15

34.3

39.3

44.4

16

38.8

44.1

49.4

17

43.2

48.7

54.2

18

47.6

53.2

58.9

19

51.8

57.7

63.5

20

55.9

62

68.1

21

59.9

66.2

72.4

22

63.7

70.2

76.7

23

67.5

74.1

80.8

24

71.1

77.9

84.8

25

74.5

81.6

88.7

26

77.8

85.1

92.4

27

80.9

88.4

95.9

28

83.9

91.6

99.3

29

86.7

94.6

102.5

30

89.3

97.4

105.5

31

91.8

100.1

108.4

32

94.1

102.5

111

33

96.1

104.8

113.5

34

98

106.9

115.8

35

99.7

108.8

117.8

36

101.1

110.4

119.7

37

102.4

111.9

121.3

38

103.4

113.1

122.8

39

104.2

114.1

124

40

104.7

114.8

124.9

41

105.1

115.3

125.6

42

105.1

115.6

126.1