January 2023 in “Journal of applied animal research” This study found that short-day photoperiod treatment in Shanbei white cashmere goats enhanced cashmere growth, increased secondary follicle density, and altered hormone levels and gene expression related to hair follicle development.
This study reports that hair samples can be used to track chronic hormone levels, revealing stress, reproductive, and sodium regulation patterns in wildebeest related to environmental factors.
This study found that women undergoing mid-trimester termination of pregnancy exhibited increased cumulative cortisol and testosterone levels in hair samples, higher anxiety, but better stress coping strategies two months post-abortion, suggesting hair testosterone may be linked to emotional vulnerability such as neuroticism during this period.
November 2023 in “Journal of animal science/Journal of animal science ... and ASAS reference compendium” In this study, researchers examined the genetic factors impacting cortisol and DHEA concentrations in the hair of healthy pigs; they found that cortisol levels were heritable and genetically correlated with behavioral stress responses, suggesting these hormones could potentially serve as indicators for selecting disease-resilient pigs.
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November 2002 in “Biology of Reproduction” This study found that prenatal antiandrogen treatment in female spotted hyenas significantly altered the LH response to GnRH, indicating partial masculinization of their anterior pituitary gland without affecting ovulatory function.