In the first month of life, the height of male babies is generally between 46 ~ 3cm and 53 ~ 4cm, and the weight is between 2 ~ 5kg and 4 ~ 3kg. The height of female babies is generally between 45-6cm and 52-7cm, and the weight is between 2-4kg and 4-2kg. Normal full-term babies gain the fastest weight in the first three months, with an average monthly weight gain of about1000g, which is about twice the birth weight in the third month and three times the birth weight at the age of one.
Although there are some differences in the development speed of different babies' height and weight, there is a standard range of height and weight. If it is not within the standard range, parents should pay attention.