AMH and obesity due to melanocortin 4 receptor deficiency: Apart from “polycystic ovary syndrome” and “women”, the other keywords with frequent occurrences were mainly selected, focusing on pathogenesis (oxidative stress, AMH, gene expression, and inflammation), characteristics (insulin resistance, obesity, and hyperandrogenism), and complication risks (metabolic syndrome, impaired glucose-tolerance, infertility, and cardiovascular diseases).