Among the developmental standards for eleven-month-old babies, male and female babies differ slightly in height and weight, with little difference in head circumference and teething, and more significant improvements in movement, speech, vision, hearing and adaptability. The specific development of the baby is also influenced by genetics, endocrine, intrauterine growth level and other factors, and there are differences between individuals. Physical development standards: 1, height and weight: male babies are 73.3-75.7cm tall and weigh 9.2-9.6kg; female babies are 71.5-74cm tall and weigh 8.5-8.9kg; 2, head circumference: head circumference is 42.3-50.2cm, with little difference between male and female babies; 3, milk teeth: milk teeth are gradually erupting, about 6 at eleven months; 4, other: the fontanelle is gradually bony. 4. Other: fontanelle gradually ossifies and shrinks. Sensory and motor development: 1, movement: can rely on objects to stand, can also hold on to chairs, carts and other support for a short time walking, thumb, index finger can finger to pick up things. Can walk briefly, at this time need to pay attention to do a good job of protection measures to avoid baby fall; 2, language: can speak “daddy”, “mommy” and other common names, repeat the adult simple word sound, some babies can also say a single word; 3, vision: eyes can With the object shaking their own rotation, but also with the eye vision to grasp objects accurately; 4, hearing: in the baby eleven months, hear the sound, the head can turn to the position of the sound; 5, adaptability: can imitate the movements of adults, voice, can do “wave”, “goodbye ” and other actions, can hold the bottle to self-feed.