The study objectives were to investigate the relationship between early exposure to genistein and obesity in young adulthood and to evaluate changes in reproductive health during puberty and adulthood following in utero exposure to genistein.Thirty-two female rats were randomized into four groups;low dose 400 mg genistein/kg diet group(LG),mid-dose 1200 mg genistein/kg diet group The study objectives were to investigate the relationship between early exposure to genistein and obesity in young adulthood and to evaluate changes in reproductive health during puberty and adulthood following in utero exposure to genistein. Thirty-two female rats were randomized into four groups; low dose 400 mg genistein / kg diet group (LG), mid-dose 1200 mg genistein / kg diet group