Furthermore, a study assessing serum FSH, LH and AMH levels in the follicular stage of the menstrual cycle in eumenorrheic healthy women without known fertility problems (n=169) and female partners of infertile couples (n=186) reported that the Ser/Ser variant was associated with significantly higher basal FSH levels compared with the Asn/Ser or Asn/Asn variants in the healthy group (G-allele affect [SE] 0.56 [0.19]; p=0.0046) (46). This evidence concerns the gene PLOD1 and Infertility.