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NORMAL PLACENTA . . . . . . . . . . . . . . . . . . . . . . . . . . .. 111
SHAPE AND SIZE VARIANTS . . . . . . . . . . . . . . . . . . . . .. 112
EXTRACHORIAL PLACENTATION . . . . . . . . . . . . . . . . .. 113
CIRCULATORY DISTURBANCES . . . . . . . . . . . . . . . . . .. 113
PLACENTAL CALCIFICATION. . . . . . . . . . . . . . . . . . . . .. 115 PLACENTAL TUMORS ........................... 115
AMNIOCHORION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 116
UMBILICAL CORD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 117