Effect of long-term administration of Ortho-Novum on the ovary, thyroid, and liver of the chicken.
D000818:Animals; D003276:Contraceptives, Oral / Q000494:pharmacology*; D005260:Female; D008099:Liver / Q000187:drug effects*; D010053:Ovary / Q000187:drug effects*; D011200:Poultry / Q000187:drug effects; D013961:Thyroid Gland / Q000187:drug effects*
D003276:Contraceptives, Oral