What are the seven different developmental periods that a person goes through after birth?

1.Embryonic development period: Generally, the embryonic development period begins at 8 weeks of gestation. From the fertilized egg to the beginning of differentiation, until the general formation, the formation of endoderm, ectoderm, mesoderm three layers of tissue.

2.Fetal period: from 8 weeks of gestation to the birth of the fetus.

This period is characterized by rapid growth and functional maturation of tissues and organs. During the fetal period, the function of the placenta can be measured and the cell chromosomes, enzyme levels and biochemical contents in the amniotic fluid can be checked. If necessary, abortion can be performed to avoid harm to the family and society after birth.

3.Neonatal period: from the time the fetus is delivered to 28 days after birth. Newborns adapt to a new environment outside the womb and undergo dramatic changes in anatomy and physiology. The function of all systems of the whole body has shifted from immaturity to initial construction and consolidation is characterized by this period.

4.Infancy: refers to the period from birth to 1 year of age.

Infancy is characterized by particularly fast growth. Within 1 year, the weight is 3 times that of birth, and the length of the body can reach 2 times that of birth. At this stage, it is necessary to strengthen the nutritional elements to prevent malnutrition and indigestion.

Otherwise, rickets and other diseases are likely to occur.

5.Early childhood: 1-3 years old.

During this period, the physical growth rate is slower than that of infancy, but the ability to speak, move, and express is significantly developed. The anterior fontanelle is closed, the baby teeth are out of order, and the urine and bowel movements can be controlled. After weaning, if you don't pay attention to nutrition, it can often cause no or little increase in height.

6.Early childhood years. Equivalent to the present"Kindergarten"Stage.

This period is characterized by slower growth and development, gradual improvement in motor and language skills, and the ability to jump, climb stairs, sing, draw, and begin to read and write. Often curious and asking. Accidents are also prone to occur if you are not careful.

7.Childhood years. Also known as the primary school age period. This stage is characterized by the basic completion of the morphological structure of the brain, the rapid progress of intellectual development, and the ability to comprehensively analyze and understand oneself better. During this period, it is necessary to ensure adequate nutrition and strengthen physical exercise.

8.Puberty (referred to as puberty): about 10-18 years of age (earlier for females and later for males, a difference of about 2 years).

This is the developmental phase of transition from childhood to adulthood, which is characterized by an acceleration of physical development followed by the maturation of the reproductive system. Puberty is generally between 11 and 12 to 17 and 18 for females and 13 to 19 and 21 for males.

There are individual differences, and they are regional, climate, environmental and ethnic.

9.Adolescence: about 16-20 years old. This period is characterized by active thinking, intellectual development, beginning to exercise independent life, and participating in more complex social activities, but the mood is easily changeable, and abnormal psychology can occur, which should be appropriately induced and educated.

The Seven Habits of Highly Effective People Three periods from birth to maturity.

There are two peak periods of growth and development in a person's life, the first peak period is infancy, and the first year of birth is infancy, also known as the infant period The characteristics of this period are that infants mainly get nutrition from milk, and their physique grows rapidly, and their height increases by 50% compared with birth in a year, their weight increases by two times, and their brain development is also very fast At the age of one, motor development has reached the level of being able to contact the people around them, such as being able to sit and start learning to walk, etc. The second peak period is 10 to 20 years old, that is, puberty, In addition, the function of the nervous system and the heart and lungs and other organs is also significantly enhanced, and adolescence is the best period of physical development and intellectual development in a lifetime The five growth and development periods include infancy, early childhood, childhood, adolescence, and adulthood

So the answer is: infants; Youth.

There are two periods of development in life: the first is the period of maternal development. From the formation of a fertilized egg to the maturation of the fetus;

The second time, the fetus is born, thus entering the second development.

The division of age groups is mainly such as the division of the reed locust from the time of birth, that is, the baby.

Infancy: 0-1 year old.

Early childhood: 1-3 years old.

Childhood: 3-5 years old.

Adolescence: 5-9 years old.

Adolescence: 9-18 years old.

Prime: the most energetic period, about 22-35 years old.

Middle age: about 35-50 years old.

Old age: After the age of 55.

Hello is infancy and adolescence.

There are two peak periods of growth and development in a person's life, the first peak period is infancy, and the first year of birth is infancy, also known as the infant period The characteristics of this period are that babies mainly get nutrition from milk, their physique grows rapidly, their height increases by 50% compared with birth in a year, their weight increases by two times, and their brain development is also very fast At the age of one, motor development has reached the level of being able to contact the people around them, such as being able to sit and start learning to walk, etc. The second peak period is 10 to 20 years old, that is, puberty, and the sudden increase in height is a significant feature of puberty, in additionThe functions of organs such as the nervous system and the heart and lungs are also significantly enhanced, and adolescence is the first period of physical and intellectual development in a lifetime The five growth and development periods include infancy, early childhood, childhood, adolescence, and adulthood

There are two peak periods of growth and development in a person's life, the first peak period is infancy, and the first year of birth is infancy, also known as the infant period The characteristics of this period are that babies mainly get nutrition from milk, their physique grows rapidly, their height increases by 50% compared with birth in a year, their weight increases by two times, and their brain development is also very fast At the age of one, motor development has reached the level of being able to contact the people around them, such as being able to sit and start learning to walk, etc. The second peak period is 10 to 20 years old, that is, puberty, and the sudden increase in height is a significant feature of puberty, in additionThe functions of organs such as the nervous system and the heart and lungs are also significantly enhanced, and adolescence is the first period of physical and intellectual development in a lifetime The five growth and development periods include infancy, early childhood, childhood, adolescence, and adulthood

So the answer is: infants; Youth.