Patient's question:
Although the developmental standards of each child are related to genetics, nutritional supply, and living environment, there is a certain range for these standards. What are the developmental indicators for a 21-month-old baby?Doctor's answer:
The height of boys is 79.4-92.5 cm, and the weight is 9.7-14.8 kg; the height of girls is 78.3-91.1 cm, and the weight is 9.1-14 kg. Additionally, the head circumference of male infants is 48.83 cm, and that of female infants is 47.67 cm. The chest circumference of male infants is 49.89 cm, and that of female infants is 48.84 cm. The babies can now walk very steadily, and those with good motor skills can run freely, walking and stopping as they please. The babies can crouch and hold their position for a short while, can climb a few steps while holding onto the railing, and their bilateral coordination is becoming increasingly strong. They always like to put all kinds of things into bottles and jars.