Infant growth is not linear and most infants experience multiple growth spurts during the first year of life. In general, infant growth spurts occur at approximately: 7 to 10 days after birth, 2 to 3 weeks, 4 to 6 weeks, 3 months, 6 months, and 9 months. There may be errors before and after. Infant’s behavior during the fierce period: Breastfed infants nurse more frequently, babies will be more anxious to eat milk than usual, and the amount of milk consumed by babies will suddenly increase during the fierce period, but this is only a phase. The growth in height and weight and the development in behavior will cause the baby to need more breast milk. For example, rolling over, crawling, walking or talking. Breastmilk provides the nutrients needed for baby’s growth and brain development. Babies can also become restless sleepers and wake up more often in the middle of the night to breastfeed. If your baby has a habit of taking naps during the day, the duration of sleep may also be shortened. The baby will be very irritable when breastfeeding, constantly holding and releasing the nipple, trying to get more milk to accommodate the body’s needs. The mother will be more prone to hunger and thirst. Pay attention to ensure a normal diet and adequate intake of water, such as milk and water, during the day to provide adequate nutrition for the baby, and to ensure that the baby sleeps and is well rested.