My son of 3 months did not poo for 5 days now, although since two Weeks ago it was three day interval, I am just worried.
Please note that babies on exclusive breastfeeding may poo up to 12 times in a day or not at all for up to 2 weeks. There's nothing to worry about as long as the poo is normal - yellow and seed-like.
Is your baby on exclusive breastfeeding?