Impairment of fertility means reduced ability or complete inability to reproduce. Synonyms for this condition include infertility, sterility, subfertility, barrenness, and impotence. Infertility refers to the inability to conceive naturally or carry a baby to term. Sterility indicates a complete lack of fertility due to physical causes. Subfertility means reduced fertility, while barrenness suggests an inability to conceive despite repeated attempts. Impotence refers to the inability to achieve or maintain an erection, which can also affect fertility. Regardless of the term used, impairment of fertility is a significant concern for those trying to conceive and may require medical attention.