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Crude oil is a complex mixture of many different components. Some of the crude oil components; petrol, kerosene and diesel are consumed by man for the management of various forms of gastrointestinal problems and male productive capacity either directly as curative agents or indirectly by eating marine animals.

This study investigates the effect of kerosene and petrol on testes and sperm parameters using twenty-five male Wistar rats divided into 5 groups (n= 5). A control group received 2ml distilled water, 2 petrol groups of rat and 2 kerosene groups of rat both were orally dosed with increasing doses of 0.2 ml and 0.4 ml respectively every other day for 28 days. The test rats were restless and sniff repeatedly during the second week of the treatment. The mean body weight of the rats was not statistically (P> 0.05) affected in both kerosene and petrol test rats.