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Intracranial (n = 184) and brain (n = 178) volumes (5th, 50th, and 95th percentiles) as a function of GA across a set MRIs of fetuses with clinically normal brains, grouped by 2-week intervals
GA (Weeks)Intracranial VolumeBrain Volume
5th50th95th5th50th95th
19.5–21.560.471.2100.837.149.770.8
21.5–23.582.899.8122.253.165.580.5
23.5–25.591.8139.5166.054.786.9110.6
25.5–27.5120.2169.1213.578.8114.6141.2
27.5–29.5184.4217.0276.0119.4150.4187.5
29.5–31.5229.1269.9350.1145.2180.2241.7
31.5–33.5248.9306.0383.4172.0206.8255.8
33.5–35.5321.4366.3406.3213.2268.1307.9