the Fetal charts for Occipito frontal Diameter here

the Fetal charts for Occipito frontal Diameter here

The International Fetal Standards
INTERGROWTH-21st
Occipitofrontal Diameter (mm)
Gestational age
(exact weeks)
Centiles
3rd
5th
10th
50th
90th
95th
97th
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
30.12
34.37
38.64
42.89
47.13
51.32
55.47
59.55
63.54
67.43
71.22
74.87
78.39
81.74
84.93
87.93
90.73
93.31
95.67
97.77
99.62
101.19
102.45
103.40
104.02
104.26
30.58
34.86
39.16
43.45
47.72
51.95
56.12
60.23
64.25
68.17
71.98
75.66
79.20
82.58
85.79
88.81
91.64
94.26
96.64
98.78
100.67
102.28
103.60
104.61
105.29
105.62
31.28
35.62
39.98
44.32
48.64
52.91
57.14
61.28
65.35
69.31
73.16
76.88
80.45
83.87
87.12
90.19
93.06
95.72
98.15
100.35
102.30
103.98
105.38
106.49
107.28
107.74
33.76
38.29
42.83
47.36
51.86
56.30
60.69
65.00
69.21
73.32
77.30
81.16
84.87
88.42
91.80
95.01
98.03
100.85
103.46
105.85
108.02
109.95
111.63
113.07
114.24
115.14
36.24
40.96
45.69
50.40
55.08
59.70
64.24
68.71
73.07
77.32
81.45
85.44
89.28
92.96
96.49
99.83
103.00
105.98
108.77
111.35
113.74
115.92
117.89
119.65
121.20
122.55
36.94
41.72
46.51
51.27
55.99
60.66
65.26
69.77
74.17
78.46
82.63
86.66
90.54
94.26
97.82
101.21
104.42
107.44
110.28
112.92
115.37
117.62
119.67
121.52
123.18
124.66
37.40
42.21
47.03
51.83
56.58
61.28
65.91
70.45
74.88
79.20
83.39
87.44
91.35
95.10
98.68
102.09
105.33
108.38
111.25
113.93
116.42
118.71
120.82
122.73
124.46
126.02
40
104.12
105.58
107.84
115.77
123.70
125.96
127.42
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