Conversation: The conversation between human and AI assistant.
[|Human|] hi i have a qustion about the mesurment of my sons head for his 9 month check up....when we went 2.5 months ago his head messured at 43 cm there i thought it was wrong so i messured at home and i got 44 cm so then at his nine month check up it messured 46.5 but he did have a flat spot that is shaping out does that have somethign to do with the incearse? but i had also messured at hom and got 46 so how can this be acurte?
[|AI|]  Hi, Head circumference is measured with a non-stretchable tap across the most prominent points on front and back of head-part of forehead about 1 finger breadth above eyebrows and occipital protuberance (the bony prominence on back of head). After 6 months, we expect an increase of 0.5 cm per month. For a baby with normal size at birth, we expect 44.5 at 9 months. To decide whether the increase is significant, we have to compare with that at birth, and plot on standard chart. Your doctor will discuss with you. Hope I have answered your question. Let me know if I can assist you further.