Exclusive breastfeeding allows you to determine whether your baby’s milk supply is sufficient based on growth and development, eating and sleeping conditions, and urine output. Generally speaking, exclusive breastfeeding can satisfy all the fluids, energy and nutrients needed by babies up to 6 months of age. 1. Growth and development: You can measure the length, body mass and head circumference regularly and mark them on the WHO Child Growth Curve to determine whether your baby’s growth is normal. As long as the baby’s growth and development are normal, it means that his/her diet is sufficient. 2. Eating and sleeping: if the baby actively releases the nipple after eating, swallows with a gagging sound, and sleeps well, it means that the milk intake is sufficient. 3. Urine output: Generally speaking, if the baby can wet 5 or 6 diapers a day, it means that the baby is able to eat enough. If the weekly weight gain is not ideal, breastfeeding breasts are not swollen, breastfeeding babies sucking on the nipple, sucking on the milk after the restless, wake up after sleep and so on for the milk intake is not enough performance. Parents are advised to observe whether their babies are getting enough milk, if not, they can make up for it with formula milk.