1. Endocrine, ultrasonic, radiographic, and clinical changes during pregnancy, parturition and lactation in dogs;Concannon,1990
2. Parturition and lactation in the bitch: serum progesterone, cortisol and prolactin;Concannon;Biol Reprod,1978
3. Prostaglandin F2 alpha induced luteolysis, hypothermia and abortion in Beagle bitches;Concannon;Prostaglandins,1977
4. Masculinization of female pups by progestogens;Curtis;J Am Vet Med Assoc,1964
5. Some aspects of equine embryo transfer;Douglas;J Reprod Fert,1980