Section I: Overview. Justification for Placental Examination. Proper Examination of the Placenta. Normal Anatomy and Histology of the Placenta. Embryonic Pathology of the Placenta. Section Ii: Pathology of the Placenta By Compartment. Pathology of the Umbilical Cord. Disorders of the Placental Membranes. Disorders of the Placental Parenchyma. Disorders of the Decidua and Maternal Vasculature. Section Iii: Multiple Gestations. Placental Pathology and Multiple Gestations. Section Iv: Neoplasia. Molar Disease: Complete and Partial Mole. Gestational Trophoblastic Disease: Choriocarcinoma and Placental Site Trophoblastic Tumour. Other Tumours of the Placenta Including Metastasis. Section V: Special Considerations. Infectious Disorder of the Placenta. Molecular Biology of the Placenta and Special Studies. Clinical Ultrasound and Pathologic Correlation of the Placenta. Medical Legal Issues Related to the Placenta.