my baby is 45 days old and for last 3 days she is not pooping. what should do for that and is it a matter of concern?

A. hi dear Call your baby's pediatrician immediately if your newborn baby (under 6 weeks old) is not pooping at all. Also call if your baby (of any age) has constipation for longer than 5 to 7 days or if they also have other symptoms.