Thirty-two Wistar male rats(22-day-old) were respectively given access to basic diet,control group with no-squalene diet(n=16) and experiment group with squalene diet(n=16) at a dose of 1 000 mg/kg food by oral administration.At the age of 75 days,10 animals of each group were sacrificed and their blood samples were taken(6 males from each group copulated with females for little size count,experiment group males feeded with squalene diet until copulation).The concentrations of plasma Leptin and serum testos...