Head Circumference (HC)
Romero R, Pilu G,
Leanty P et.al.
The central
nervous system.
GA (wks) |
-2SD |
Mean |
+2SD |
11 |
33 |
63 |
93 |
12 |
46 |
75 |
104 |
13 |
59 |
88 |
117 |
14 |
71 |
101 |
131 |
15 |
84 |
113 |
142 |
16 |
86 |
126 |
156 |
17 |
109 |
138 |
167 |
18 |
121 |
151 |
181 |
19 |
133 |
163 |
193 |
20 |
145 |
175 |
205 |
21 |
157 |
187 |
217 |
22 |
169 |
198 |
227 |
23 |
180 |
210 |
240 |
24 |
191 |
221 |
251 |
25 |
202 |
232 |
262 |
26 |
213 |
242 |
271 |
27 |
223 |
252 |
281 |
28 |
233 |
262 |
291 |
29 |
244 |
271 |
300 |
30 |
251 |
281 |
311 |
31 |
260 |
289 |
318 |
32 |
268 |
297 |
326 |
33 |
276 |
305 |
334 |
34 |
283 |
312 |
331 |
35 |
289 |
319 |
349 |
36 |
295 |
325 |
355 |
37 |
301 |
330 |
359 |
38 |
306 |
335 |
364 |
39 |
310 |
339 |
368 |
40 |
314 |
343 |
372 |