A survey will be fulfilled by the midwife no more than 2 hours after the intervention. In this survey, the midwife takes notes on the comfort with which the technique was performed with four possible answers (high, moderate, medium and low comfort level). Furthermore, the acupuncturist will ask to the puerperal woman about the pain felt with the technique with four possible answers (painless, mild pain, moderate pain and high pain). The acupuncturist will also ask to the puerperal woman if she would recommend this technique to any of her friends with two possibles answers (yes or not).