The very first thing that people learn about their newborn baby is sex, weight and height.
These physical characteristics are very important, first of all, for understanding the correctness and timeliness of the development of the baby.
Indicators at birth
For a newborn baby are considered the norm: Growth rates from 45 to 51 cm, and weights from 2550 to 4000 g. An important fact is the ratio of these quantities, called the Quetelet index. This index shows, whether enough the baby received a food during the prenatal life. The norm is considered to be the value of this indicator from 60 to 70. The Quetelet index is considered correct only for those babies who were born in due time.
When a child is born, doctors also measure the circumference of his head. In averaged values, it should be 33 - 36 cm.
Physical development of children under one year old
For a child who just came into the world,The following values are typical: height - from 45 to 51 cm, weight - from 2,6 to 3,5 kg. The baby already has the following reflexes: sucking, swallowing, grasping reflex and blinking.
The child of the very first month of life has: Height - 52 - 55 cm, weight - 4,2 - 4,4 kg. The kid is able to hold his head, while looking up, and tries to lift it, lying on his tummy. His reaction to very loud sounds and sharp movements is already noticeable.
In a two-month-old child: Height - 55 - 58 cm, weight - 5 - 5.3 kg. It lifts well and holds the head for 1 to 1.5 minutes. He turns it towards the noise. The Kid holds on tight and grabs the objects with the palm of his hand.
Three months after birth: height - 59 - 61 cm, weight - 6.0 - 6.3 kg. The child easily holds the head for 4 to 7 minutes. In the supine position, it rises a little, leaning on the elbows.
A four-month-old child: Height - 61 - 64 cm, weight - 6.4 - 6.9 kg. Lying on his back, the child can occasionally raise his head and freely flips from the back to his stomach. With great pleasure the kid plays with various toys hanging over the crib, probes them and pulls them to the mouth.
Five months: height - 63 - 68 cm, weight - 7,4 - 7,8 kg. The child can already sit down, but you can not keep your back without support. Already knows the voice of my mother.
Six months: height - 65 - 70 cm, weight - 7.7 - 8.0 kg. The child independently sits down without support and freely flips from the back to the tummy, tries to crawl and say the first syllables.
Seven months: height -67 - 71 cm, weight - 8,2 - 8,9 kg. The child already knows how to crawl on all fours. With the support of his hands, he stands and actively crosses his legs.
Eight months: height - 70.1 - 72 cm, weight - 8.4 - 9.6 kg. Kroha himself gets up, sits down, holding on to the crib, tries to walk.
Nine months: height - 72 - 7.3 cm, weight - 9.2 - 9.9 kg. The child walks, holding at the same time for support, can fulfill the simplest requests, responds to his name.
Ten months: height - 72 - 74 cm, weight - 9.6 - 10.4 kg. The kid can walk, holding his hand, can perform complex movements, begins to pronounce words.
Eleven months: height - 73 - 75 cm, weight - 9.9 - 10.5 kg. The child knows the names of many objects and parts of the body, he has the accuracy of finger movements.
Twelve months: height - 74 - 76 cm, weight - 10.2 - 10.8 kg. The child can pronounce about 10 words.
Each child is individual and his physicalDevelopment is not always the same with standard calendar norms. But the lack of any skills, or abnormalities in the growth of the child - an occasion for consultation with a specialist.