Evaluation and Treatment Evaluation includes examination of sperm, observation of basal body temperature or luteinizing hormone peaks in the female to determine whether ovulation is taking place, the ruling out of obstructions of the fallopian tubes or vas deferens, and blood tests that measure hormone levels. Treatment is geared to the specific problem. The first step may be treatment of underlying disease and, in men, avoidance of substances that might affect sperm count. Fertility drugs, some of which increase the likelihood of multiple births, are often prescribed. If necessary, surgical correction of blocked tubes can be attempted.