The effects of two indigenous plants on the fertility of rats have been studied. Lepidagathis longifolia, also kn ow n as Penluruh, Serga dan Penggugur, has been found to reduce the litte r size of rats if an aqueous extract (500 an d 5 5 0 m g /kg bod y weight) of its roots is administered orally fo r 10 days po st-co itum. This finding is co n sisten t with its alleged used as an abortifacient. In contrast, the oral administration of aqueous and ethanol extracts (250 m g /kg body weight; 30 days) o f Hibiscus rosa sinensis flowers (Bunga raya) has no effect on the weight and histology o f the sex organs o f male rats.