Final answer:
Mare postpartum complications including retained placenta, uterine artery hemorrhage, peritonitis, and large colon volvulus.
Step-by-step explanation:
The subject of this question is Mare postpartum complications. These complications pertain to issues that may arise in a mare after giving birth. One of the common complications mentioned is retained placenta which occurs when fragments of the placenta remain in the uterus and can cause postpartum hemorrhage. Other complications mentioned include uterine artery hemorrhage, peritonitis, and large colon volvulus.