出生后的第一年下半年,称为婴儿晚期。这时期生长发育的速度虽然不如以前快,但也仍然不慢。其主要特点如下: 一、开始学步身体的发育一岁儿童的身长大约等于出生时的1倍半,一般达到75公分左右。他的体重几乎等于出生时的3倍,一般超过9公斤。一岁内婴儿四肢增长的速度比躯干增长的速度快。到一岁时,坐高 The second half of the first year after birth is called late baby. Growth and development during this period although not as fast as before, but still not slow. The main features are as follows: First, the beginning of toddler physical development One year-old child’s body length is about equal to one and a half times of birth, usually about 75 cm. His weight is almost equal to three times the birth, usually more than 9 kg. Baby limbs grow faster at one year than the torso grows. By the age of one, sit high