Use a weighing scale.
When using weighing scale, let the baby calm down first, or weigh it while sleeping. The activities in the weighing scale will affect the weighing effect.
Multiple weighing and averaging
Baby's weight is affected by many aspects, such as before and after meals, seasonal climate and so on. Weighing scale should be used in different time periods, and the average value can be obtained by multiple weighing.
Comprehensive observation
Combined with the comprehensive observation of the baby's height and weight, ensure that the baby's weighing scale is fully charged.