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ABSTRACT
Lack of thermoregulation of scrotal temperatures has been shown to cause testicular hyperthermia, which leads to genital heat stress. Exposure to high environmental temperatures could have a deleterious effect on spermatogenesis and this can in turn affect the level of fertility in males. As global temperature rises, heat stress has become one of the factors affecting the reproductive performances of mammals although the level of impact is not fully established. The aim of this research is to study the effect of heat adaptation on reproductive functions of male albino Wistar rat. Twenty-four (24) adult male rats weighing between 200-300g were purchased for this study. Following a two weeks’ acclimatization, the rats were divided into four groups. Group 1 (control) (n=6): were maintained at an ambient temperature of 25-320C, Group 2 (n=6) were exposed to a temperature of 37-400C five hours daily for a period of 21 days after which they were returned to room temperature for another 21 days, Group 3 (n=6) were exposed to a temperature of 37-400C five hours daily for a period of 21 days and sacrificed thereafter while Group 4 (n=6) were exposed to a temperature of 37-400C five hours daily for a period of 42 days.
