By six weeks of gestation the tips or cusps of the primary teeth appear.
By the fourth month the hard tissues (the enamel and dentin) of the primary teeth have begun to form.
The enamel crowns of most primary teeth are fully formed by eight months of gestation.
Teething (the eruption of the primary teeth through the gums) may cause discomfort or pain, particularly with the large molars.
Unfortunately, loss of primary teeth at this age may hinder the young child's ability to eat and speak.