Abstract

GONZALEZ-DOMINGUEZ, María S  and  MALDONADO-ESTRADA, Juan G. Prolonged pregnancy associated to an inappropriate medroxiprogesterone acetate prescription in a bitch: Is rational and ethics the use of exogenous progestin in the bitch?. Rev Colom Cienc Pecua [online]. 2006, vol.19, n.4, pp.442-450. ISSN 0120-0690.

Medroxiprogesterone acetate (MPA) has been commonly used as a contraceptive in bitches by its effect on preventing estrous presentation, instead of abundant evidence on undesirable collateral effects such as uterine and mammary tumors and nodules, Cystic endometrial hyperplasia-pyometra complex, as well as acromegaly-like lesions. In this report a 6 year -old Fox-terrier wire coat bitch is presented which was administered a depot MPA formulation in order to prevent an undesired mating-related pregnancy that was attended at the by a prolonged pregnancy at day 74 after the undesired mating. The patient showed distended abdomen, dyspnea, with no changes in hemoleukograms values, but with macerated fetuses as diagnosed by clinical and radiographic findings. An elective cesarean operation followed by ovary hysterectomy was performed. The patient showed an optimal clinical evolution. Several aspects related to the use of MPA in canine reproduction, the recommendation to cautiously prescribe its use as contraceptive agents in bitches, as well as the consideration of other alternatives for management of undesired mating in dogs, are discussed.

Keywords : dystocia; fetal maceration; progestagens.

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