FSHR and male infertility: Statistically significant association was detected between the FSHR c.2139A > G G-allele (coding Ser680) and lower total testes volume in both the Baltic cohort (linear regression additive model, p = 0.010, G-allele effect = −1.16 mL) and Estonian idiopathic male infertility group (p = 0.007, effect = −1.77 mL) (Tables 3 and 4).