Is Hibiscus rosa sinensis Linn. a potential source of antifertility agents for males?

The effects of oral administration of aqueous and alcoholic extracts of flowers of H. r. sinensis (250 mg/kg BW/day, 30 days) on the reproductive organs of male rats have been examined. The results indicate that the organ weights were unaffected by the extracts: weights of the testis, epididymis, ventral prostate, and seminal vesicle of the treated animals were not significantly different from those of the controls. The testis and epididymis of the rats also showed normal histological features, irrespective of treatment. No apparent toxicity of the extracts was discernible.