INS and polycystic ovary syndrome: The amount of testosterone, glucose, and insulin in the serums of women with cytosine/guanine allele (CG) and guanine/guanine allele (GG) genotypes were considerably higher than the cytosine/cytosine allele (CC) genotypes, which describes the possible effects of DNA sequence variations of melatonin receptor genes on the occurrence of PCOS.