“…The most commonly observed risk factors were higher BMI (twenty-six studies [13, 20, 22, 23, 29, 30, 34, 37–39, 41–43, 45, 49, 51, 52, 55, 60, 61, 65–67, 75, 76]), older age (twenty-five studies [12, 18, 26, 30, 33, 34, 38, 39, 41–43, 46, 48–50, 52, 55, 56, 60, 66, 67, 72, 73, 75, 76]), and family history of diabetes mellitus (twenty-four studies [9, 18–21, 25, 29, 30, 33, 34, 37–39, 41, 42, 45, 46, 52, 55, 61, 66, 67, 72, 76]). Other observed risk factors include history of spontaneous abortions or stillbirths (nine studies [21, 33, 34, 39, 42, 53, 65, 66, 76]), history of macrosomia (7 studies [39, 42, 43, 45, 66, 72, 75]), multiparity (7 studies [11, 13, 39, 45, 52, 72, 76]), and higher socioeconomic status (5 studies [13] Hill, 2005 #21} […”