Another limitation is that the study was conducted in asingle public center with a predominantly Caucasian population, failing to accountfor racial/ethnic differences in AMH levels, as well as variations caused by geneticand environmental factors such as obesity, smoking, and vitamin D deficiency (Iliodromiti et al., 2013;Tal & Seifer, 2013). Here, AMH is linked to obesity due to melanocortin 4 receptor deficiency.