This is a difficult question to answer without being able to see your grandson. His sleeping pattern is probably still quite normal for a baby of his age. He should be sitting or at least trying to sit at this age so this may or may not be something that we should take notice of. I am concerned about his history of apnoeic attacks when he had whooping cough. Because of these episodes it would be best to have him assessed by a paediatrician with experience in developmental paediatrics. Please ask your paediatrician to refer you to an expert.
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