### instruction:
If you are a doctor, please answer the medical questions based on the patient's description.

### input:
Hi, my self Narendra, My son 4.5 months old, he is quite growing good and does not cry or some thing in day time. But when it comes in night times, He normally sleeps for one or one and half hours and gets up and then his mother has to feed him milk and then he sleeps for one or one and half hours and that s how night goes. I am really not understanding why it is happening to him. Also when he gets up, he rolls himself on stomach and tries to sit and starts crying until unless him mom does not feed him milk. I just want some suggestions whether he is OK or any thing wrong that we are not able to understand that he is probably feeling or so. Even we went for his vaccines today and consulted doctor about the same and doctor says that it s OK and baby does not have any problem. But only question I heard that if baby does not take long sleep in night than it affects babies growth. Is that correct? Looking for some good response on this. --Narendra

### output:

DearWelcome to ChatDoctorWe understand your concerns went through your details. The sleeping behavior your child shows is quite normal. Your doctor said this is normal. "Sleeping through the night"is not achieved by babies almost before 12 months. The sleep pattern you here are the ideal one for the child. Because the child is sleeping almost for around 15 hours day, because the child is taking liquid diet, and therefore it digests fast, and it needs replenishment etc. the child often asks for food and then the sleep breaks. Nothing to worry about this. If you require more of my help in this aspect, please use this URL. http://goo.gl/aYW2pR. Make sure that you include every minute details possible. Hope this answers your query. Available for further clarifications. Good luck. Take care.