The Relationship Between the Onset of Lactogenesis II And Mother's Anthropometric Indices Following Delivery

Introduction: Delayed onset of lactogenesis II is one of the reasons of poor lactation outcomes. Recently,obesity in mother is implicated in delayed onset of lactogenesis II. Therefore, this study was performed to assess the relationship between the onset of lactogenesis II and antropometric indices at 14±1 days following child birth. Methods: This descriptive and analytic research was conducted in Shahid Rajaee hospital of Tonekabon City and Imam Sajjad hospital of Ramsar City. The samples were 103 parturient women who were enrolled by purposive sampling. According to mothers' report of latogenesis II,they were put into two groups,with lactogenesis II within 72 hours and beyond,respectively. Then anthropometric indices of mothers were registered on 14th day after delivery.Data gathering was done by interview, observation forms and file. Analysis of data was performed by student t-test, Chi square, Mann-Whitney, Fischer's exact test, Pearson correlation, and Multivariate-Logistic regression. Results: Pearson coefficient test showed a direct meaningful relationship between anthropometric measurements at 14 days following child birth onset of lactogenesis II. There were relationship between onset of lactogenesis II and mid arm circumference (r=0.248, P= 0.012), skin fold thickness (r=0.233, P=0.018), Calf circumference (r=0.387, P< 0.001), body mass index (r=0.378, P<0.001). By using logistic regression, results of study revealed the role of BMI is more significant in delayed onset of lactogenesis II (P= 0.006), and R.O.C curve defined that mothers with BMI ≥ 29 are at risk for late onset of lactogenesis II (P< 0.001). Conclusion: All of the antropometric indices have direct and meaningful relation with onset of lactogenesis II, but Body Mass Index has more significant role in comparison to other factors.