Abstract
Background The importance of breastfeeding for maternal and child health has become an international consensus. However, it has been found that lactation-related nipple problems are common and there are some important factors affecting the effectiveness of breastfeeding. Multiple studies recommended the laid-back breastfeeding, but the researches are on various levels of quality and the results are controversial.Methods We systematically searched the following twelve databases: Cochrane Library, EMBASE, Medline, Ovid, PubMed, Web of Science, CINAHL, Scopus, SinoMed, Chinese National Knowledge Infrastructure (CNKI), WanFang, and VIP from inception to January 28,2020. All studies reporting the laid-back breastfeeding or biological nurturing were considered, regardless of they are randomized controlled trials. Two trained investigators independently evaluated the quality of the included the articles and screened the data. All the data were analyzed separately using Review Manager Version 5.3 and STATA/SE Version 15.1. Results A total of 12 studies involving 1,936 groups of postpartum women and their newborns were included. The results of meta-analysis showed that nipple trauma (RR = 0.47; 95% CI 0.29,0.75; p < 0.002), nipple pain (RR = 0.25; 95% CI 0.20,0.32; p < 0.00001), the correct posture of latching (RR = 1.22; 95% CI 1.11,1.33; p < 0.00001)and position comfort (ES = 0.01; 95%CI -0.28,0.30; p = 0.006) of experimental group were all better than control group, and the differences were statistically significant ( p < 0.05), which indicates that the laid-back position has a positive effect on maternal breastfeeding. Conclusion Laid-back position has significant advantages in decreasing the incidence of nipple trauma and nipple pain compared with traditional breastfeeding postures, and it appears that laid-back position is conducive to the correct posture of latching. However, current evidence does not show different breastfeeding outcomes in the two groups of position comfort. Laid-back position is helpful to solve lactation-related nipple problems and it can be used as a recommended position for breastfeeding. Key words: Breast-feeding, Biological Nurturing, Laid-back Breastfeeding, Meta-Analysis