The hormonal response of males of the Allocricetulus curtatus hamster to the natural excreta (urine and midventral gland secretion [MVGS]) of conspecific females during several seasons of the year was studied when the animals were kept in the conditions of natural light and temperature. In the autumn, no significant changes in the testosterone level in the blood of males for any of the signals presented were observed. In the winter and summer, there was a trend of increasing this indicator in response to the smells of urine and MVGS of females in their diestrus state.