Foaling rates and risk factors for abortion in pregnant mares presented for medical or surgical treatment of colic: 153 cases (1993-2005). 2009

Tracey S Chenier, and Ashley E Whitehead
Department of Population Medicine, Ontario Veterinary College, University of Guelph, Guelph, Ontario N1G 2W1. tchenier@uoguelph.ca

The purpose of this study was to determine foaling rates in mares presented for medical or surgical treatment of colic, and to examine risk factors associated with abortion following colic. A retrospective analysis of 153 medical records found that mares treated surgically for colic (P = 0.0007) were 3.5 times more likely to have a negative pregnancy outcome than were mares treated medically for colic. Anesthetic time (P = 0.01) and intra-operative hypotension (P = 0.03) were significantly associated with negative pregnancy outcome. Mares with an anesthetic time > or = 3 h were 6 times more likely to abort. Signs of endotoxemia (P = 0.30), hypoxia (P = 0.89), flunixin meglumine administration (P = 0.13), mucous membrane color at the time of presentation (P = 0.82) and capillary refill time (P = 0.76) were not associated with pregnancy outcome. There was no difference in the foaling rate for mares that had received progestin supplementation versus those that had not (P = 0.42). In this study, the significant risk factors for abortion were surgically treated colic, long anesthetic time, and intraoperative hypotension.

UI MeSH Term Description Entries
D007022 Hypotension Abnormally low BLOOD PRESSURE that can result in inadequate blood flow to the brain and other vital organs. Common symptom is DIZZINESS but greater negative impacts on the body occur when there is prolonged depravation of oxygen and nutrients. Blood Pressure, Low,Hypotension, Vascular,Low Blood Pressure,Vascular Hypotension
D007431 Intraoperative Complications Complications that affect patients during surgery. They may or may not be associated with the disease for which the surgery is done, or within the same surgical procedure. Peroperative Complications,Surgical Injuries,Complication, Intraoperative,Complication, Peroperative,Injuries, Surgical,Complications, Intraoperative,Complications, Peroperative,Injury, Surgical,Intraoperative Complication,Peroperative Complication,Surgical Injury
D011247 Pregnancy The status during which female mammals carry their developing young (EMBRYOS or FETUSES) in utero before birth, beginning from FERTILIZATION to BIRTH. Gestation,Pregnancies
D011248 Pregnancy Complications Conditions or pathological processes associated with pregnancy. They can occur during or after pregnancy, and range from minor discomforts to serious diseases that require medical interventions. They include diseases in pregnant females, and pregnancies in females with diseases. Adverse Birth Outcomes,Complications, Pregnancy,Adverse Birth Outcome,Birth Outcome, Adverse,Complication, Pregnancy,Outcome, Adverse Birth,Pregnancy Complication
D011256 Pregnancy Outcome Results of conception and ensuing pregnancy, including LIVE BIRTH; STILLBIRTH; or SPONTANEOUS ABORTION. The outcome may follow natural or artificial insemination or any of the various ASSISTED REPRODUCTIVE TECHNIQUES, such as EMBRYO TRANSFER or FERTILIZATION IN VITRO. Outcome, Pregnancy,Outcomes, Pregnancy,Pregnancy Outcomes
D003085 Colic A clinical syndrome with intermittent abdominal pain characterized by sudden onset and cessation that is commonly seen in infants. It is usually associated with obstruction of the INTESTINES; of the CYSTIC DUCT; or of the URINARY TRACT. Abdominal Cramps,Infantile Colic,Abdominal Cramp,Colic, Infantile,Cramp, Abdominal,Cramps, Abdominal
D005260 Female Females
D006734 Horse Diseases Diseases of domestic and wild horses of the species Equus caballus. Equine Diseases,Disease, Equine,Disease, Horse,Diseases, Equine,Diseases, Horse,Equine Disease,Horse Disease
D006736 Horses Large, hoofed mammals of the family EQUIDAE. Horses are active day and night with most of the day spent seeking and consuming food. Feeding peaks occur in the early morning and late afternoon, and there are several daily periods of rest. Equus caballus,Equus przewalskii,Horse, Domestic,Domestic Horse,Domestic Horses,Horse,Horses, Domestic
D000034 Abortion, Veterinary Premature expulsion of the FETUS in animals. Veterinary Abortion,Abortions, Veterinary,Veterinary Abortions

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