Skip to main content

Table 5 Gestational age ssessment by head circumference (HC)

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

 

Centiles

      

Centiles

     
 

50th

 

2.5th

 

97.5th

  

50th

 

2.5th

 

97.5th

 

HC (mm)

weeks

days

weeks

days

weeks

days

HC (mm)

weeks

days

weeks

days

weeks

days

70

12

2

11

2

13

3

140

18

0

17

0

19

0

72

12

3

11

3

13

4

142

18

1

17

1

19

1

74

12

4

11

4

13

5

144

18

2

17

2

19

2

76

12

5

11

5

13

6

146

18

3

17

3

19

3

78

12

6

11

6

14

0

148

18

4

17

4

19

4

80

13

0

12

0

14

1

150

18

5

17

5

19

5

82

13

1

12

1

14

2

152

19

0

17

6

20

0

84

13

3

12

2

14

3

154

19

1

18

1

20

1

86

13

4

12

3

14

4

156

19

2

18

2

20

2

88

13

5

12

4

14

5

158

19

3

18

3

20

3

90

13

6

12

5

14

6

160

19

4

18

4

20

4

92

14

0

12

6

15

0

162

19

5

18

5

20

5

94

14

1

13

1

15

1

164

19

6

18

6

20

6

96

14

2

13

2

15

3

166

20

0

19

0

21

0

98

14

3

13

3

15

4

168

20

1

19

1

21

1

100

14

5

13

4

15

5

170

20

2

19

2

21

2

102

14

6

13

5

15

6

172

20

3

19

3

21

3

104

15

0

13

6

16

0

174

20

4

19

4

21

4

106

15

1

14

1

16

1

176

20

5

19

5

21

5

108

15

2

14

2

16

2

178

20

6

19

6

21

6

110

15

3

14

3

16

4

180

21

0

20

0

22

0

112

15

4

14

4

16

5

182

21

1

20

1

22

1

114

15

6

14

5

16

6

184

21

2

20

2

22

2

116

16

0

15

0

17

0

186

21

3

20

3

22

3

118

16

1

15

1

17

1

188

21

4

20

4

22

4

120

16

2

15

2

17

2

190

21

5

20

5

22

4

122

16

3

15

3

17

3

192

21

5

20

6

22

5

124

16

5

15

4

17

5

194

21

6

20

6

22

6

126

16

6

15

5

17

6

196

22

0

21

0

23

0

128

17

0

16

0

18

0

198

22

1

21

1

23

1

130

17

1

16

1

18

1

200

22

2

21

2

23

2

132

17

2

16

2

18

2

202

22

3

21

3

23

2

134

17

3

16

3

18

3

204

22

3

21

3

23

3

136

17

4

16

4

18

5

206

22

4

21

4

23

4

138

17

6

16

6

18

6

208

22

5

21

5

23

5

       

210

22

5

21

6

23

5