1, weight: 8.3-12.7kg for boys; The girl is 7.6- 1 1.9 kg.

2. Height: male 71.8-82.7 cm; Female student 69.8-81.2cm.

3. Head circumference: 47. 1 1 cm for boys and 45.82 cm for girls.

4. Teeth: Eight deciduous teeth have grown.

13 months baby will:

1, limb development: 13-month-old babies can stand on their own for a moment, and sometimes they can walk a few steps without help. The fast-growing baby has learned to walk independently. You can open and close the book, you can do some simple little moves independently, and your fingers are more flexible. If an adult holds the baby's hand, the baby can go up and down the stairs.

2. Language development: the baby can understand some simple languages and respond to them. With the correct education of parents, the baby can say about 10 simple words and express his emotions with one or two words. If not, shake your head, if yes, nod your head.

3. Balance ability: At this time, the baby with his hands in the air will slowly put his hands down after a while, and sometimes he can walk freely. This is because young babies rely on small hands to find balance.

4, interpersonal communication: At this time, the baby likes to associate with adults and will find ways to attract the attention of adults.