"Placental fragments" refer to small pieces or remnants of the placenta, which is the organ that develops during pregnancy to provide oxygen and nutrients to the growing fetus. Full definition
When a woman has retained placental fragments in her uterus, her milk coming in is delayed. (health-and-parenting.com)
If Temaril P is administered to dogs in their last trimester, there is a high risk for premature delivery of the puppies which can lead to problems in the tonicity of the uterus of your dog, possible puppy death, and even retention of placental fragments. (mypetneedsthat.com)
Anderson, A. M. Disruption of Lactogenesis by Retained Placental Fragments. (verywellfamily.com)