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This study developed a rat model for catamenial epilepsy, suggesting that neurosteroid withdrawal may increase seizure frequency and help test new treatments.

In this study, the authors concluded that the VCD-induced follicular depletion rat model can effectively simulate the perimenopause transition, with hormonal changes distinguishing early/mid-transition from late transition to estropause.

This article reviews idiopathic hypogonadotropic hypogonadism (IHH), discussing its genetic and pathophysiological features, and it does not present new clinical results.

This study found that an adult female farm-raised blue fox exhibited an abnormal hair growth cycle and seasonal estradiol variation, with a delayed winter coat cycle resulting in spring shedding.

In this study, researchers determined that poor feed quality and nutritional deficiency, especially low vitamin A levels, were leading causes of impaired reproductive function in nutria, with deficiencies most pronounced during February-March and linked to clinical signs like growth retardation and alopecia.

This article provides an overview of ovulation disorders, discussing ovarian, hypothalamic, and endocrine defects but reports no new clinical findings.

This study found that the estrous cycle influences the effect of the δ-GABAAR agonist THIP in reducing binge drinking behavior in female mice, with receptor expression elevated during diestrus.

In this study, nandrolone decanoate treatment in rats caused persistent diestrus and altered steroid receptor expression and sex hormones, especially at higher doses, with partial reversibility at lower doses over time.

This study found that while prepubescent female goats showed strong olfactory responses to active buck hair, this sensory stimulation alone did not advance the onset of puberty.

This study found that in mink, the pituitary gland is essential for normal seasonal pelage cycles, and manipulating hormone levels can affect hair growth and type.

This study outlines a multidisciplinary approach to investigate primary amenorrhea, emphasizing the necessity to consider medical history, physical examination, and potential hormonal or anatomical causes, and recommends early referral in cases of chromosomal abnormalities or persistent amenorrhea following the development of secondary sexual characteristics.

This study reports that alopecia areata is a rare and typically cosmetic condition in horses, affecting breeds such as Appaloosas and quarter horses, with a possible seasonal pattern of worsening in spring and summer.

This study found that Anovlar effectively reduced pain in severe dysmenorrhea cases and regulated cycles in oligomenorrhea patients, but some side effects and occasional treatment failures were reported.

This article discusses the systematic diagnostic evaluation of secondary amenorrhea and provides guidance for referral considerations; it reports no new research findings.

This study found that asebic mice exhibit abnormal sebaceous gland differentiation and insufficient sebum production due to defective regulation of cell processes, despite possessing normally developing sebaceous glands initially.

This study found that blocking androgen receptors in male rats during the perinatal period led to permanently increased estrogen and ER-a expression in the hypothalamus, affecting sexual preference in adulthood.

This study found that adrenal hormones appear to inhibit winter fur growth onset in mink and may affect the duration of inactivity between fur growth periods.

This study found that premenopausal exercising women with oligomenorrhea had lower triiodothyronine levels and truncal fat percentage compared to other groups, suggesting distinct energetic and reproductive profiles.

In this study, perinatal androgen deprivation in male rats led to elevated estrogen levels and a lack of sexual motivation towards gonadally-intact female rats.

This study defined menstrual phase-specific reference intervals for circulating androgen levels in young women, highlighting that anovulatory females showed higher androgen, LH, and FSH levels compared to ovulatory females.

In this case report, treatment with antibiotics, finasteride, and prostate omentalization restored fertility in a 6-year-old German Shepherd with prostatitis and astenoteratozoospermia, avoiding surgical castration.

This study found that the pituitary gland is crucial for normal pelage color cycles in weasels, with certain hormones influencing regrowth of pigmented or white hair after molting.

This study developed a novel mouse model of catamenial epilepsy by manipulating neurosteroid levels and demonstrated that withdrawal increases seizure susceptibility, potentially linked to changes in GABAA receptor-subunit plasticity.

This study describes the kenogen phase, where hair follicles rest after shedding, and finds its duration and frequency are greater in individuals with androgenetic alopecia, potentially contributing to baldness.

This study found that women with hyperandrogenic amenorrhea do not show reduced bone mineral density compared to controls, indicating they may be protected from osteopenia.

This case report describes the presence of a teratoma within an equine antral follicle and suggests that the ovary maintained functionality despite the teratoma, as indicated by active antral follicles and recent ovulation.

This source provides a comprehensive overview of amenorrhea, detailing its classification, potential causes such as hormonal imbalances and structural abnormalities, and the various management strategies including hormone therapy and lifestyle modifications tailored to its underlying causes.