Anatomical closure of the ductus arteriosus in the dog (Canis familiaris)

Abstract

The observation of the anatomical closure of foramen ovale was carried out in 124 pups (57 males and 67 females), with age varying between 3 hours and 21 days old. We have observed that in the animals sacrified with one day old, the foramen ovale was pervious in 100% of them; two days old, in 16% of the animals; three days old, in 18% of the dogs; four days old, in 50% of the pups, and over six days old, the ductus venosus was anatomically closed in100% of the studied pups.