“…After excluding 14 studies with different topics, we reviewed 95 articles for data extraction. We further excluded another 38 articles due to extreme obesity ( n = 2) [ 37 , 38 ], pre-eclampsia ( n = 1) [ 39 ], duplicate data sources ( n = 1) [ 40 ], gestational diabetes mellitus (GDM) ( n = 4) [ 41 , 42 , 43 , 44 ], inability to integrate ( n = 20) [ 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 , 58 , 59 , 60 , 61 , 62 , 63 , 64 ] and continuous BMI ( n = 10) [ 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 ], resulting in 57 articles that were included in the meta-analyses ( Figure 1 ).…”