When you dream of being infertile, then such dream shows the shortage of imagination in your personality. Perhaps there are certain things that dont go according to plan. Alternatively, the dream may show the actual difficulties while getting pregnant.
Dream dictionary: infertile dream meanings
(See Impotence)
(Infertile | Sterile) Impotence in a dream means protection from sin, asceticism, abstinence and renouncing the pleasures of this world. If one sees himself castrated in a dream, it means that he will gain power and fame. If one marries a woman and finds himself incapable of performing sexual intercourse with her in a dream, it means that he will engage in a commerce without a capital.