Apart from [[Oestrous_Cycle_-Pharmacological_Manipulation_of_Oestrous_Cycles_-_Anatomy_%26_Physiology|Pharmalogical manipulation]] of the oestrous cycle, Photoperiod, Nutrition and temperature may also play a part in the controlling entry into the breeding season in some species.
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Apart from [[Oestrous_Cycle_-Pharmacological_Manipulation_of_Oestrous_Cycles_-_Anatomy_%26_Physiology|pharmalogical manipulation]] of the oestrous cycle, photoperiod, nutrition and temperature may also play a part in the controlling entry into the breeding season in some species.