| Summary: | Faecal glucocorticoid metabolite (FGM) is frequently used as a non-invasive tool to assess adrenocortical activity in animal conservation and welfare studies. However, studies assessing the stress level and its effect on the reproductive hormones of female Malayan sun bear is lacking. This study aims to assess the level of stress of the female Malayan sun bear in captivity and its effect on the female reproductive hormones of the female Malayan sun bears in captivity in Malaysian Borneo. Through FGM analysis via the enzyme-linked immunoassay (ELISA) method, it was found that the bear living in BSBCC has the lowest level of glucocorticoid. as for the relationship between the level of stress and the female reproductive hormones, the level of estrogen which was indicated by estradiol, decreases as the level of FGM increases. In contrast, the level of progesterone increase as the level of FGM increases. It can be concluded that the level of stress in captivity could affect the level of estrogen and progesterone and a high level of progesterone does not always indicate a good reproductive function in female mammals. © 2024 Institute of Physics Publishing. All rights reserved.
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