Obesity is a growing public health concern that has been linked to several chronic diseases, including breast cancer. Adipose tissues and hormones play a crucial role in the development of both obesity and breast cancer. The relationship between these two conditions is complex and involves the interaction of various biological and environmental factors. This paper aims to review the current literature on the role of adipose tissues and hormones in the development of obesity and breast cancer. The focus is on the mechanisms by which excess fat accumulation in the body affects the production of hormones and other signaling pathways, leading to the development of cancer.