Height and weight of a one and a half year old child

When a child reaches one year old, his body will undergo a big change. The height and weight of the baby at this time will change greatly. The height and weight of a one and a half year old baby vary from person to person, but the difference will not be that big. It is closely related to the child's absorption and usual eating habits. If the food tastes better, he will definitely grow faster. The child's height is also closely related to genetics, so as long as the child is healthy and grows slowly, it doesn't matter. At a certain stage, the height of children of the same age will not be that different.

1. Weight: The average weight of a newborn at birth is 3 kg. There has been an increasing trend in recent years, but a birth weight of 2.5 kg is considered normal. The weight reaches about 6 kg at 5 months after birth. The average weight at one year old is 9 kg. At 2 years old, it weighs 12 kg. The rule for future weight gain is: weight (kg) = age × 2 + 8. However, there are individual differences among children. If the weight is lower than this standard, it does not necessarily mean that the child is pathological. You should ask a doctor to check.

2. Height: The height of a newborn baby at birth is about 50 cm. If the height at birth is less than 45 cm, it is considered to be stunted. The average height at 1 year old is 75 cm. 85 cm at 2 years old. The future height growth pattern is: height (cm) = 75 + age × 5.

3. Head circumference: In children, head circumference reflects the development of the brain and skull, and is an important indicator for diagnosing neurological diseases and bone development. It is 34 cm at the newborn and 4 cm at the age of 1 year. At 2 years old it is 46-48 cm. Reaching 50 cm by 5 years old. It grows 12 cm within one year after birth, and then the speed slows down. The fontanelle of a child is open for about one and a half years after birth, and closes after about one and a half months. The anterior fontanelle gradually shrinks and closes completely at 14-18 months. It is pathological if the fontanelle closes too early or too late. If it closes too early, the head circumference will be too small, resulting in microcephaly; if it closes too late, it is often a manifestation of rickets. If the fontanelle has not closed after the age of 2, the cause should be checked.

4. Chest circumference: The chest circumference of the neonate is about 32 cm, and it is 46 cm at 1 year old, and it develops faster thereafter. Before the age of 1, the head circumference is larger than the chest circumference. At the age of 1, the two are equal. After that, the chest circumference increases faster than the head circumference. The ratio of head circumference to chest circumference is an important indicator for clinical observation of children's development.

5. Tooth development: Children begin to grow teeth from 4-8 months after birth. Generally, the first deciduous tooth starts to grow at 6 months after birth, and they grow in pairs. The general pattern of teeth eruption is age in months minus 6. The order is: upper and lower front teeth (incisors), first molars, canines and second molars. About 4 teeth grow every 4 months (see the table below for specific time). If the deciduous teeth have not erupted by 10 months after birth, the reason should be found out.

6. By the end of 16 months, the normal average baby weight is 9.95-10.55 kg, the normal average height is 78.73-80 cm, and the number of teeth is 8-16. When they are one and a half years old, boys weigh 9.1~13.9 kg and are 76.3~88.5 cm long. Girls weigh 8.5~13.1 kg and are 74.8~87.1 cm long. 12 to 14 teeth have erupted, the anterior fontanelle has closed, and the head circumference is 45 to 46 cm. When they are two years old, boys weigh 9.9~15.2 kg and are 80.9~94.4 cm long. Girls weigh 9.4~14.5 kg and are 79.9~93.0 cm long. 16 teeth have erupted. The head circumference is about 47 cm, and the chest circumference is larger than the head circumference.

When a child reaches a specified time, the child's first tooth will start to grow. The child's height may lag behind a little, but the teeth will definitely grow. If the child has not grown teeth after a certain period of time, you should take the child to see a doctor to find out whether the child is malnourished. The above is a reference for parents. You can add some nutrition to your child under the doctor's advice. In addition to milk powder, breast milk is the best, so if conditions permit, you should still breastfeed your child. This will lay a good physical foundation for your child from the beginning.