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体格发育标准:男女婴身长平均分别为60.68—70.24米和59.88—67.88米,体重平均分别为5.86—9.18公斤和5.55—8.19公斤,头围平均分别为39.84—44.76厘米和39.05—43.4厘米,胸围平均分别为38.66—46.5厘米和38.4—44.8厘米。 1—6个月婴儿体重的计算:体重=出生体重(克)+月龄×600克。4个月婴儿的体重约为出生时体重的两倍。生长发育特点:仰卧时头可自由转动180°;趴着时脖子能挺直,头可抬起;扶其髋骨能坐;经常眨眼,可看到两米以內,可辨认人人的面孔,认识母亲等亲近的人;常把手指放在嘴里吮吸,手能拿握玩具;会大声发笑,牙牙学语。
Physical development standards: boys and girls average length of 60.68-70.24 meters and 59.88-67.88 meters, respectively, the average weight was 5.86-9.18 kg and 5.55-8.19 kg, respectively, head circumference were 39.84-44.76 cm and 39.05-43.4 cm, respectively, chest circumference With an average of 38.66-46.5 cm and 38.4-44.8 cm, respectively. 1-6 months baby’s weight calculation: weight = birth weight (g) + month old × 600 grams. At 4 months, the baby weighs about twice the weight at birth. Growth and development characteristics: supine head can rotate freely 180 °; tummy when the neck can be upright, the head can be lifted; help the hip can sit; often blink, you can see two meters or less, can identify everyone’s face, Know the mother and other close people; often put his finger in his mouth sucking, hand holding the toy; will laugh loudly, babbling.