I agree with Reine that it is more of a personal choice.
One important thing is note would be that a pacifier should not be taken as a substitute for nurturing or feeding.
Here are some useful guidelines to manage your baby’s pacifier use:
- Allow your baby to choose whether or not he wants the pacifier
- Offer the pacifier when you know that he is not hungry (e.g., between feedings)
- Avoid using the pacifier as a way to delay baby’s feeding
- Try giving your baby the pacifier before nap time
- Do not tie a pacifier around your baby’s neck or attached it to the crib
You can refer to this site for more useful information on pacifier use:
http://www.babycenter.com/0_pacifiers-pros-cons-and-smart-ways-to-use-them_128.bc