Infants at the period between birth and one year and toddlers between one and two year old normally grow very first with their physical or bodies changing in a intense and quick manner. Bodily growth is normally taken to refer to changes in biological structure that is experienced in children as time continues to pass. Among the vital and very critical elements that determine the development of bodily growth in toddlerhood and infancy are brain and bodily adjustments; expansion of reflexes, feelings, motor skills, sensitivities and learning abilities; and health matters. The period between birth and the fourth week is normally known as the “postnatal period”. The majorities of babies weighs around 5.5 to 10 pounds, and are around 17 to 22 inches long. With male infants, they are a little bit longer and heavier compared to their female counterparts. Babies who are delivered either two or more weeks after their supposed date are termed as post mature babies. Both post mature and premature infants are normally critically prone to complications such as illness, mental or brain damage, or even transience, than when they are fully developed babies (Achenbach & Edelbrock, 2003). Physical development particularly occurs during the period between birth and the age of two years. At the age of six months the infant is normally expected to weigh at least double and triple when one year ends. Likewise, the baby’s length or height also grows to around 10 and 12 inches with the baby’s quantity changing during the first two years. The dimension of the baby’s head is also seen to decrease in quantity from on third of the whole body at birth, to a quarter at the age of two years and to an eighth by the time adulthood is reached. Since babies at the infant age are not in a position to endure on their own, infants have particular innate skills for endurance and adaptive reasons. Reflexes are involuntary reactions to stimulus that make it possible for infant babies to retaliate to the surrounding prior to any learning occurrence. Some like grasping are just temporal behaviors that vanish after some time and in due course become part of voluntary reactions. A lot have been asserted and even published concerning the significance of socialization in the ultimate human natures during adulthood. According to historical thoughts, there have been very few studies and enquiries into the biological impacts of which individuals later become. A puzzle presented to illuminate the extent to which socialization is impacted by individual’s hereditary and biological factors and the degree of social surrounding one is born into and which bringing up process occurs (Achenbach & Edelbrock, 2003). The heritable qualities are claimed to be a proportion of individual’s personality, identity, and biological characters which originate from hereditary or socialization surrounding factors. In the chronicle of social science the claim of a “blank slate” or “tabula rasa” has won wide advocacy. This was a hypothetical assertion that human beings are normally delivered without mental or academic abilities with every thing they learn being recorded before them by their fundamental and secondary socialization providers. The notion of full nurture has been opposed by numerous scholars, pur