婴儿啼哭常令初为父母者焦急而无措。但研究显示,婴儿啼哭多为正常生长发育行为,仅极小部分因病症引发。过去30年,儿科专家开展了大量有关婴幼儿啼哭的研究,发现婴儿在出生之前就开始练习啼哭,啼哭可谓新生儿为适应宫外陌生环境的自我调整。在出生的头几个星期,婴儿啼哭频率会稳步增加,出生2个月时是啼哭发生的高峰期,到3～4 Infants crying often make the early parents anxious and helpless. However, studies have shown that infants cry mostly for normal growth and development behavior, only a very small part of the disease triggered. Over the past 30 years, pediatricians have conducted a large number of studies on crying in infants and young children. They found that infants started practicing crying before they were born, and crying can be described as a self-adjustment of the newborn to adapt to the environment outside of the palace. During the first few weeks of life, the frequency of infant crying increases steadily. At 2 months of age, it is the peak of crying. When it reaches 3 to 4