Very first that people learn about the newborn child - it is a floor, weight and its growth. These physical characteristics are very important, first of all, for understanding of correctness and timeliness of development of the kid.
Indicators at the birth
For the newborn baby are considered as norm: growth indicators - from 45 to 51 cm, and weight - from 2550 to 4000 g. The important fact is the ratio of these sizes called by Quetelet's index. This index shows whether the kid of food in the period of the pre-natal life received enough. Norm the value of this indicator from 60 to 70 is considered. Quetelet's index is considered correct only for those kids who are given birth in the put time.
At appearance of the child on light, doctors also measure a circle of his head. In average values, it has to make 33 - 36 cm.
Physical development of kids about one year
The following values are characteristic of the child who only was born: growth - from 45 to 51 cm, weight - from 2.6 to 3.5 kg. At the kid the following reflexes are already observed: sucking, swallowing, grasping reflex and blinking.
The child of the very first month of life has: growth – 52 - 55 cm, weight – 4.2 - 4.4 kg. The kid is capable to hold the head, looking at the same time up, and shows attempts to raise it, lying on a tummy. Its reaction to very loud sounds and sharp movements is already noticeable.
At the two-month child: growth – 55 - 58 cm, weight - 5 - 5.3 kg. It well lifts and holds a head within 1 - 1.5 minute. Turns it, towards noise. The kid strong holds and is enough objects with a palm.
Three months later after the birth: growth - 59 - 61 cm, weight - 6.0 - 6.3 kg. The child with ease holds a head within 4 - 7 minutes. In a prone position on a stomach, rises a little, leaning on a lokotka.
Four-months child: growth – 61 - 64 cm, weight - 6.4 - 6.9 kg. Lying on a back, the child can raise occasionally the head and freely turns over from a back on a stomach. With great pleasure the kid plays with various toys hanging over a bed, feels them and pulls to a mouth.
Five months: growth – 63 - 68 cm, weight - 7.4 - 7.8 kg. The child can already sit down, but is not able hold a back without support yet. Already knows mom's voice.
Six months: growth – 65 - 70 cm, weight - 7.7 - 8.0 kg. The child independently to sit down without support and freely turns over from a back on a tummy, tries to creep and say the first syllables.
Seven months: growth-67 - 71 cm, weight - 8.2 - 8.9 kg. The child is already able to grabble. With support stands up for hands and actively crosses legs.
Eight months: growth – 70.1 - 72 cm, weight - 8.4 - 9.6 kg. The baby himself gets up, sits down, holding a bed, tries to go.
Nine months: growth – 72 - 7.3 cm, weight - 9.2 - 9.9 kg. The child goes, holding at the same time a support, can satisfy the simplest requests, responds on the name.
Ten months: growth – 72 - 74 cm, weight - 9.6 - 10.4 kg. The kid is able to go, holding a hand, can carry out difficult movements, begins to pronounce words.
Eleven months: growth – 73 - 75 cm, weight - 9.9 - 10.5 kg. The child knows names of many objects and parts of a body, it has an accuracy of movements of fingers.
Twelve months: growth – 74 - 76 cm, weight - 10.2 - 10.8 kg. The child can pronounce about 10 words.
Each child is individual and his physical development is not always identical with standard calendar norms. But lack of any skills, or deviations in growth of the child – a reason for consultation with the expert.