The document discusses the complications of postpartum hemorrhage (PPH) during the third stage of labor, delineating its types (primary and secondary) and causes. It highlights the risk factors, clinical features, diagnostics, and management strategies for both primary and secondary PPH, emphasizing the importance of uterine tonicity and addressing potential trauma or coagulopathy. Immediate care, prevention strategies, and various management approaches for retained placenta and complications like placenta accreta and uterine inversion are also detailed.