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Postsphenoid ossification hyperintensity area as a function of gestational age in weeks (A). A positive correlation is seen between the postsphenoid ossification hyperintensity area and gestational age in weeks (R2 = 0.307). The postsphenoid ossification/SP signal ratio as a function of gestational age in weeks (B). The postsphenoid ossification/SP signal ratio does not show any increase with gestational age (R2 = 0.05).
