36 citations
,
July 1980 in “Journal of Toxicology and Environmental Health” In this animal study, rats given high doses of ethynylestradiol showed dose-related estrogenic effects, delayed tumor onset in females, and no overall increase in tumor incidence compared to controls.
24 citations
,
July 1980 in “Journal of Toxicology and Environmental Health” This study found that feeding norethindrone acetate to albino rats over two years caused various dose-related health effects, such as growth retardation and liver changes, but did not increase overall tumor incidence.
20 citations
,
June 1985 in “Toxicologic Pathology” In this study, prolonged high-dose steroid treatment in rats caused several pathological changes, some of which regressed, particularly improvements in mammary gland tumors and pituitary-related symptoms, after stopping treatment.
17 citations
,
January 2021 in “Agrobiological Records” This study reported that allethrin caused dose-dependent toxico-pathological effects, including decreased feed intake, body weight, and blood parameters, and organ damage in adult male albino rats.
25 citations
,
September 1977 in “Journal of Toxicology and Environmental Health” This study in female beagle dogs found that long-term exposure to oral contraceptive steroids resulted in significant reproductive and mammary gland changes, with the relevance to human tumor risk remaining uncertain.