There is no absolute developmental standard for 7-month-old babies, which can be analyzed in terms of height, weight, head circumference, gross and fine motor movements, language development and other aspects. The details are as follows. Height: the height standard of 7-month-old male babies is 62.7cm-77.4cm, with an average height of 69.8cm, and the height standard of female babies is 61.3cm-75.6cm, with an average height of 68.2cm. Weight: The weight standard of 7-month-old male babies is 6.24kg-12.20kg, with an average weight of 8.76kg, while the weight standard of female babies is 5.90kg-11.40kg, with an average weight of 8.11kg. Head circumference: The head circumference standard of 7-month-old male babies is 40.4cm-48.4cm, with an average head circumference of 44.2cm, and the head circumference standard of babies is 39.5cm-47.2cm, with an average head circumference of 43.1cm. Gross and fine movements: 7-month-old babies can sit independently, can crawl forward slowly, change toys from one hand to another, etc. Language development: babies can understand their own names, and can pronounce “daddy” and “mommy”. The development of 7-month-old babies is multi-faceted, in addition to the above performance, it will also be manifested in other ways. There is no absolute standard. However, if your baby’s development is significantly later than that of babies of the same age, it is recommended that you consult a doctor promptly.