The motor development was consisted of seven periods across the lifespan, each period is characterized by the different motor skills. Progression from one period to another would depend on the changes in three critical constraints, as well as individual's skills and experiences. According to the developmental perspective, the changes in the motor skills were defined as sequential, cumulative and individual. Everyone would follow the same sequence of the motor development, however, age does not determine the sequence because the skills are built based on individual's background experiences and knowledge.
Prenatal Period
The first stage of motor development is the prenatal period, it is the period from conception to birth. The prenatal period is characterized by three major sub periods: Germinal, embryonic and period. The germinal period represents the first two weeks after the fertilization, where the ovum attached the uterine wall and the cell layers are formed. The embryonic period began from two to eight weeks, when the cephalacadual and proximodistal growth took place. At this time, infants could move around to obtain the upright posture, where different parts of the body are also distinguishable. Our motor development began prenatally, usually started from the embryonic and fetal period. The fetal period started from two to nine months, when most of the body systems were getting more structurally developed. However, the organs and body systems were still functionally immature. The fetal period was characterized by rapid growth and organ completion, as well as reflex activities and movements. As early as three months, babies could demonstrate both spontaneous and reflexive movements. My mother told me that she first felt my kicking and hand movement around the fourth month, and she also went to do the ultrasound to check if I was a healthy baby. My mother kept the testing record updated, the doctor also told her about my gender