my 2 months old boy didn't poo for 3 days .what might be reason earlier it used to twice a day

A. According to the age of your child there could be a possibility that your child can pass motion a number of times in the day and sometimes not at all in a day or number of days both the situations are normal as you know that kids don’t have very good digestion in this which is my number of motions can be much higher than expected or no motion due to being on hundred percent liquid diet