1. Detection of intravaginal spermatozoa after natural mating in the bitch;Whitacre;Vet Clin Pathol,1992
2. Onset of diestrus in the Beagle bitch: Definition and significance;Holst;Am J Vet Res,1974
3. Prostaglandin induction of abortion in pregnant bitches after misalliance;Feldman;J Amer Vet Med Assn,1993
4. Contraception and pregnancy termination;Verstegen,2000
5. Efficacy and toxicity of estrogens commonly used to terminate canine pregnancy;Bowen;J Amer Vet Med Assn,1985