4 months baby’s physical development level: 1, body shape: due to genetics and feeding, each baby’s fat and thin and size of the gap will gradually widen. Each infant grows chubby and chubby, the subcutaneous fat of the face further increases, the more lovely. 2.Weight: 5.6-8.7 kg for male infants and 5.0-8.2 kg for female infants. 3.Length: 59.7-68.0 cm for male babies and 57.8-66.4 cm for female babies. 4, head circumference: 42.14 cm for male infants and 41.39 cm for female infants. 5.Breast circumference: 42.51 cm for male infants and 41.58 cm for female infants. 6, motor function: the baby’s head has been able to stabilize the center, and can flexibly turn, when lying down can use the hands to support the head and chest, can already roll over, can be more flexible to change the posture, hold the point can sit steadily, the baby will use the hands to grasp the things encountered, and can hold the bottle to eat milk by themselves. 4 months baby’s level of intelligent development: 1, vision: he began to slowly distinguish colors, preferred colors in order: red, yellow, green, orange, blue. The ability to focus on targets near and far is close to that of adults, and will track people walking around the room. 2. Hearing: they can recognize different sounds, distinguish between male and female voices, are sensitive to the feelings expressed in language, and can react differently. 3.Emotion: When being reprimanded or feeling lonely, the baby will cry, and when being comforted or stroked, the baby will laugh out loud and will cry or laugh consciously. 4.Language: when talking to him, he will coo in response. 4 months baby feeding points: because the baby is developing quickly, so the appetite is very strong, often sucking the breast empty, at the same time the baby began to secrete amylase, you can start to add pure rice flour, slowly fed to the baby, and should continue to feed the baby egg yolk, fruit puree and vegetable water, to maintain a balanced nutrition is very important. Daily care truths and precautions: 1. Suddenly anorexia will appear in babies at 4-6 months, parents do not need to be nervous, usually 5-10 days will improve naturally, as long as the baby can take in enough water or juice every day there is no problem, after a few days they will resume eating milk again. Correction of bad habits and wrong methods: first of all, you can dilute the milk powder, add more supplements or juice and water, etc. You can starve your baby for two meals, and wait patiently for a few days, the symptoms of milk aversion can subside automatically. 2, do not play with the baby in the middle of the night Some babies sleep too much during the day, or for other reasons, they start to play at night after waking up, at which time parents should not accompany their children to play together in the middle of the night. This is not conducive to the development of children’s sleep habits. Correction of bad habits and wrong methods: you should turn off the headlights, keep a dark environment, give comfort and pat the baby to help fall asleep.