The lowest testosterone levels (1.02 ± 0.35 nmol/L) and estradiol levels (190 ± 80 pmol/L) and the highest prolactin concentration (39.9 ± 13.9 ng/mL) were found in group A. Conclusions: The obtained results show that postpartum thyroiditis is complicated by multidimensional impairment of female sexual functioning, which is accompanied by mood deterioration. This evidence concerns the gene PRL and thyroiditis.