1. The purpose of this study is to research and compare two sucking modes' effect(breast-feeding and non-nutritive sucking) and difference,hypothesis is that these two kinds of methods can decrease pain for Chinese term infants receiving heel stick. 2. A convenient sample of 90 neonates from a hospital in Beijing undergoing heel stick for Newborn Screening Program Blood Test were enrolled. They were randomized into three groups: * breast-feeding group * non-nutritive sucking group * control group 3. The results showed that: * Breast-feeding can reduce crying and grimace time, increase oxygen saturation. * Non-nutritive sucking can delay grimace's starting time, increase oxygen saturation.
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changes in heart rate value and oxygen saturation value,time length of grimacing and crying
Timeframe: 1 minute before heel lance and 8 minutes after heel lance, the duration of facial grimacing and crying, heart rate and oxygen saturation values at every 15 seconds.Time length of heart rate, oxygen saturation returned to baseline values