According to Wikipedia, an infant or baby is the very young offspring of humans. A newborn is an infant who is within hours, days, or up to a few weeks from birth. In medical contexts, newborn or neonate (from Latin, neonatus, newborn) refers to an infant in the first 28 days of life (from birth up to 4 weeks after birth, less than a month old).
The term "newborn" includes premature infants, postmature infants and full term newborns. The term infant is derived from the Latin word infans, meaning "unable to speak" or "speechless." It is typically applied to children between the ages of 1 month and 12 months; however, definitions vary between birth and 3 years of age. "Infant" is also a legal term referring to any child under the age of legal adulthood.
According to Wikipedia, a toddler is a young child who toddles about. During the toddler stage, the child learns a great deal about social roles, develops motor skills, and first starts to use language.
Some literatur say preschooler is a stage where a child be between two or three to five. This stage marks the end of diapers, extreme tantrums, and early language learning. In addition, child will grow physically, emotionally, and intellectually.
According to Wikipedia, colic (also known as infant colic, three month colic, and Infantile colic) is a condition in which an otherwise healthy baby cries or screams frequently and, for extended periods, without any discernible reason.
The condition typically appears within the first two weeks of life and almost invariably disappears, often very suddenly, before the baby is three to four months old, but can last up to 12 months of life. It is equally common in bottle-fed and breastfed babies.The crying often increases during a specific period of the day, particularly the early evening.
According to Wikipedia, teething is the process by which an infant's teeth sequentially appear by breaking through the gums. Teething may start as early as three months or as late, in some cases, as twelve months.
The typical time frame for new teeth to appear is somewhere between six and nine months. It can take up to several years for all 20 deciduous (aka "baby" or "milk") teeth to emerge. Though the process of teething is sometimes referred to as "cutting teeth", when teeth emerge through the gums they do not cut through the flesh. Instead, special chemicals are released within the body that cause some cells in the gums to die and separate, allowing the teeth to come through