Seven-month baby development standards can be analyzed from physical development, language development, perceptual ability, motor development and so on, as follows: 1. Physical development: seven-month male baby height at 62.7cm to 77.4cm, weight at 6.24kg to 12.2kg, head circumference at 40.4cm to 48.4cm, female baby height at 61.3cm to 75.6cm, weight at 5.90kg to 11.4kg, head circumference at 39.5cm to 47.2cm. 2. Language development: seven-month-old babies can actively imitate speech, can babble and can express language with movement. 3. Perceptual ability: seven-month-old babies’ perceptual ability has gradually matured, and they can pay attention to things moving in the distance, such as airplanes and birds in the sky, and they can skillfully search for sound sources and understand different tones of voice. 4. Motor development: seven-month-old babies’ heads are more flexible, can rotate freely, can also maintain an unsupported sitting position, can reach the toys on the table, will turn over, and finger activities are more flexible, such as grasping and holding. Due to different factors such as the growing environment and individual’s physical condition, there are differences in the growth and development of babies, the above standards are for reference only. If there are any abnormalities, it is recommended to go to the hospital to find out the cause of the abnormalities and intervene at an early stage.