Although Tooth development starts in the womb, Baby's first tooth is a real milestone. Most babies first tooth peeks through normally between 6 and 8 months but there is a lot of variance. When a baby's first tooth appears has nothing else to do with a baby's development.

Expect the bottom front teeth first, followed by the top front teeth. Then come the molars and the canine teeth. Last to arrive are the back molars. Your baby should have a full set of primary teeth by age 3. Permanent teeth will start to replace the baby teeth between age 4 and 6.

What are the Signs of Teething? It has been noted in a study published in Pediatrics that there is a notable increase in the following symptoms during teething:
Biting
Drooling
Gum Rubbing
Sucking
Irritability
Wakefulness
Ear Rubbing Facial Rash
Decreased Appetite
Mild Temperature

Some babies will be more irritable than others and they may have a lower threshold for pain, while some babies are never apparent to be teething. You may notice that the most painful teeth to come in seem to be the molars as these are larger teeth that need to break through the gums.

Before you attribute symptoms to teething if you have a fussy baby, remember to assess everything that is going on in your baby's life at the moment. New foods, a real fever? For teething, most pediatricians agree that giving infant Tylenol is okay to give at night time if your infant is having a problem sleeping because of teething. But be sure to check with your own pediatrician.