Hi doctor, my newborn son weighed 2.9 kgs at birth, after few days he is 2.6 and finally back to 3 kgs at first month. Now he is one month 9 days old. His weight is 3.2,is this normal or low weight? He is always crying alot, does crying affects his growth? And few days before he is constipated for 5 days, doc gave syrup after that he passes the stool. After birth he experienced little jaundice, so doctor gave 2 days photo therapy after that he is normal. What's going on, is all are normal? Please help me.