Many hormones and their structural and functional analogs are used as medication . The most commonly prescribed hormones are estrogens and progestogens (as methods of hormonal contraception and as HRT ),  thyroxine (as levothyroxine , for hypothyroidism ) and steroids (for autoimmune diseases and several respiratory disorders ). Insulin is used by many diabetics . Local preparations for use in otolaryngology often contain pharmacologic equivalents of adrenaline , while steroid and vitamin D creams are used extensively in dermatological practice.
1) Feline Reproduction. In Feldman EC and Nelson RW:
Canine and Feline Endocrinology and Reproduction, 2nd ed. Sydney, 1996, WB Saunders Company.
2) Feline Reproduction. In Daris W, editor: Compendium of Animal Reproduction, 5th ed. 1998, Intervet.
3) Physiology of Reproduction in Mammals. In Daris W, editor: Compendium of Animal Reproduction, 5th ed. 1998, Intervet.
4) The Urogenital Apparatus. In Dyce KM, Sack WO, Wensing CJG editors: Textbook of Veterinary Anatomy, 2nd ed. Sydney, 1996, WB Saunders Company.
5) Verstegen J, Feline Reproduction. In Ettinger SJ, Feldman EC, editors: Textbook of Veterinary Internal Medicine, Sydney, 2000, WB Saunders Company.
6) Female Physiology Before Pregnancy and the Female Hormones. In Guyton AC and Hall JE: Textbook of Medical Physiology, 9th ed. Sydney, 1996, WB Saunders Company.
7) The Nervous System. In Dyce KM, Sack WO, Wensing CJG editors: Textbook of Veterinary Anatomy, 2nd ed. Sydney, 1996, WB Saunders Company.
8) Johnson CA, Disorders of the Estrous Cycle. In Nelson RW, Couto CG editors: Small Animal Internal Medicine, 2nd Ed. Sydney, 1998, Mosby Inc.
Female Cat in Heat - Copyright, October 19, 2009, -informed-veterinary-advice-.
"Pregnyl" is a registered trademark of Organon Australia Pty. Ltd.
Please note: the "female cats in heat" information provided on this page contains general recommendations and veterinary advice only. The information provided is based on published information; relevant veterinary literature and publications and my own experience as a practicing veterinarian. The advice given is appropriate to the vast majority of feline owners, however, owners with cats should take it upon themselves to ask their own veterinarian for further advice on feline estrus. Owners with specific circumstances (breeding cats, showing cats, stud cats, breeding businesses, those whose cats have hormone-mediated medical or behavioral issues, those seeking to control estrus artificially in breeding/showing queens etc.) should ask their vet what the safest and most effective protocol is for their situation.