Canine placental sites
Keywords: canine, anatomy, involution, placental, sites, uterus
A canine uterus viewed from its dorsal aspect. The tract is from a mature bull mastiff bitch. Placental sites from a previous pregnancy are shown here. Bitches experience the slowest uterine involution of all domestic species; about 90 days in duration. However even after involution is complete, evidence of previous pregnancies may be visible. Judging by the presence of corpora lutea in the ovaries of this animal, these placental sites must have been approximately 6 months old.
