A constipated baby should not be referred to as a baby who has not passed a stool but rather to a baby who is passing hard stools.

HOW CAN I HELP MY BABY?
If your baby is on formula you try changing him onto a specialized one formulated for constipated babies.
Do some leg exercises moving baby’s legs in a bicycle motion.
If over 6 months offer baby water to drink.
Adjust your baby’s diet adding more roughage and fruits such as prunes or dates.
Sometimes you may need to consult your baby clinic or doctor and a mild stool softener or suppository may be prescribed.