9 citations
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March 1998 in “PubMed” Surgery successfully treated the ferret's adrenal issue, leading to hair regrowth and improved health.
October 2011 in “InTech eBooks” Menstrual cycles can be irregular for women of childbearing age.
17 citations
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August 1971 in “Journal of Investigative Dermatology” 186 citations
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February 1980 in “Clinical Endocrinology” During puberty, hormone levels rise, with early increases in some steroids and most menstrual cycles becoming regular by six years after menarche.
Exercising women with irregular periods have lower thyroid hormone levels and less body fat.
20 citations
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January 1995 in “Cells tissues organs” Changing light periods synchronized wool growth cycles in sheep.
June 2003 in “Obstetrical & Gynecological Survey” Postmenopausal ovary stromal cells have a unique makeup and limited steroid production, suggesting androgens come from the adrenal gland.
December 2024 in “Quality in Sport” Hormonal balance is vital for women's health and performance, but therapies like contraceptives and steroids have both benefits and risks.
January 2007 in “UKnowledge (University of Kentucky)” Steers with winter hair coats and reduced sweating struggled with heat, leading to less grazing and poor performance.
1 citations
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January 1999 in “Theriogenology” 25 citations
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September 1977 in “Journal of Toxicology and Environmental Health” High doses of some contraceptive steroids cause health issues in dogs, but their relevance to humans is unclear.
88 citations
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June 2016 in “Human Reproduction Update” New hormonal contraceptives are safer, have fewer side effects, and offer health benefits for women.
4 citations
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December 2017 in “Journal of zoo and wildlife medicine” Hormonal changes during the reproductive cycle may cause seasonal skin problems in captive female fossas.
1 citations
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July 2024 in “Journal of Assisted Reproduction and Genetics”
Different drugs are used to manage breeding, prevent or end pregnancy, and treat reproductive issues in dogs and cats.
2 citations
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January 1985 in “Theriogenology” Hormonal treatments affect cow fertility and early embryo development.
20 citations
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January 1979 in “Journal of Experimental Zoology” Plucking hair speeds up the next hair growth, but hormones can change this timing.
June 1995 in “International Journal of Gynecology & Obstetrics” The new method showed that endometriotic tissue has lower estrogen receptor levels but similar progesterone levels compared to normal endometrium, with both following a similar cycle.
25 citations
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February 2019 in “Genomics” Cashmere and milk goats have different hair growth cycles and gene expressions, which could help improve wool production.
68 citations
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April 1965 in “General and Comparative Endocrinology” The pituitary gland controls seasonal fur color changes in weasels.
February 2015 in “Oxford University Press eBooks” December 2022 in “Journal of Pharmaceutical Negative Results” Late onset of first period and irregular development of sexual traits in teenage girls can lead to poorer reproductive health.
31 citations
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November 1965 in “Journal of Mammalogy” The pituitary gland is crucial for normal mink fur cycles.
4 citations
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August 2017 in “The Nurse Practitioner” Secondary amenorrhea has many causes and requires thorough evaluation to treat and restore menstrual cycles.
September 1997 in “Journal of the European Academy of Dermatology and Venereology” Hirsute women with ovarian-sourced hirsutism are more likely to have irregular periods, with higher BMI and altered hormone ratios.
30 citations
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July 2004 in “Fertility and Sterility” Amenorrhea is when a woman doesn't have periods, with primary amenorrhea starting by age 15 or within five years of breast development, and secondary amenorrhea when periods stop for three months. It affects 3-4% of women not pregnant, breastfeeding, or in menopause, mainly due to polycystic ovary syndrome, hypothalamic amenorrhea, hyperprolactinemia, and ovarian failure.
11 citations
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July 1998 in “Journal of Investigative Dermatology” β-estradiol slows hair growth in mice.
5 citations
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October 2011 in “Small ruminant research” Goat hair growth and follicle activity change with the seasons and differ between males and females.
22 citations
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February 2002 in “Journal of theoretical biology” The model showed that randomness accurately describes individual hair growth cycles and that synchronization can cause large fluctuations not seen in humans.