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  1. In the moment of birth, the influence of the mother is replaced with the genetic potential of the child, which in coordination with the physical and psychological factors of the environment, controls the further development of the child. 
  2. Children must be provided with physical, mental and social welfare.
  3. The size of the newborn depends 38% on the heredity, and 62% of the conditions that are provided in the mother’s womb.
  4. The increase in body weight and height of the child are indicators of health and well-being.
  5. The newborn’s head is relatively large and is ¼ of the length of the body.
  6. In the 5th month the infant doubles the birth weight, at the end of the first year triples it, and at the age of 2 quadruples the body weight.
  7. In the first trimester, the infant gains about 2,500 g, in the second 1,750 g, in the third 1,250 g, and in the fourth about 1,000 g.
  8. The growth of the child in the first year is very turbulent. Bodyweight increases by an average of 50%.
  9. The growth of the newborn child in the first trimester is on average 10 cm, in the second 6.5 cm, in the third 5 cm, and in the fourth 3.5 cm.
  10. At the end of the first year, boys on average grow 26 cm in length, and girls 25 cm.
  11. In the second year of life, the speed of length growth in both sexes is equal and is 12 cm.
  12. From the end of the second to the end of the fifth year, in both sexes, there is an average length growth of 6 cm per year.
  13. From the sixth year until the beginning of puberty, the growth rate is 5 cm per year.
  14. Height increases by 3.5 times from birth to the end of adolescence, and body weight increases by more than 20 times.
  15. On average, the baby’s teeth start growing between the fifth and the ninth month.
  16. At the end of the 1st year, most babies have 6 to 8 teeth.
  17. At the end of the second year, the child has all 20 deciduous teeth.
  18. In newborns and infants, the abdomen is bulging due to the relatively large internal organs and weakness of the abdominal and intestinal muscles.
  1. The intestines of a newborn are about 300 cm long, i.e., 6 times longer than the length of the body (in adults are 4 and a half times longer).
  2. Abdominal cramps begin when the intestines of the baby are inhabited by bacteria that produce gas when fed.
  3. A baby from 3 to 5 months sleeps 18 to 20 hours, of which 8 to 10 hours during the day.
  4. A baby from 6 to 8 months sleeps 16 to 18 hours, of which 6 to 8 during the day.
  5. А 12-month-old baby sleeps 14 to 16 hours, of which 4 to 6 hours during the day.
  6. Each period in childhood has its own developmental characteristics and crises.
  7. Large babies progress more slowly in their development, and small babies progress faster.

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