I would like to ask about my 1.5-month-old baby boy’s sleep pattern. He is not sleeping properly during both morning and nighttime. At night he sleeps approximately around 8 hours in total, but during the daytime he rarely takes short naps. According to his age, I understand that babies usually need more sleep throughout the day and night. I am concerned that he may not be getting enough sleep. Is this sleep pattern normal for a 1.5-month-old baby? Should I be concerned or bring him for a physical examination?