The height of 8-month-old female babies should reach 62.5~77.3 cm, with an average height of 69.6 cm; The weight of a female baby should be 6.13 ~11.80kg, and the average weight is 8.4 1 kg.
The development standard of an 8-month-old baby should focus on measuring the baby's head circumference in addition to the height and weight. The head circumference of a male baby should normally be 4 1~48.9 cm, with an average head circumference of 44.8 cm. The head circumference of the female baby is 40. 1~40.7 cm, and the average head circumference is 43.6 cm.
The 8-month-old baby should have grown the upper and lower incisors. Not only can he do it alone, but he can also walk a few steps by holding the railing, and he can crawl freely in the direction of rotation according to his own wishes. The baby's sports ability will make great progress every day, and his limbs can support himself and crawl forward more and more flexibly.
Eight-month-old babies have also entered a language sensitive period. They will smile at the well-meaning expressions and praises of adults, but show a very wronged side to the criticism of adults. At this time, many babies have learned to call their mothers and can understand some simple languages of adults. Simple actions like goodbye and clapping are also easy for babies to do.