Utility is an economic term for a person's overall well-being and satisfaction. Consumers play a role in the economy by maximizing utility, which means allocating their scarce resources, such as limited time or money, most efficiently. Utility maximization is different for every person.
You can start using it right away but it was suggested to us by our midwives to hold off until 6 weeks as pacifier use can mess with their breastfeeding latch (it's a different kind of sucking).
When should my baby stop using a pacifier? The BabyCenter Editorial Team. Sucking on a pacifier may be beneficial for infants because it's linked to a lower risk of sudden infant death syndrome (SIDS) (although it's not clear why). But after 6 months, pacifier use is less helpful and more of a habit.