placenta praevia
(chemistry) A chemical engineering process in which hydrocarbons are hydrogenated and desulfurized catalytically as part of oil refining
(pathology) A complication of pregnancy in which the placenta is inserted partially or completely in the lower segment of the uterus (above the opening of the cervix).
plural of odontoid
(UK) Alternative form of safe harbor
産科医は、患者が前置胎盤（子宮下部に胎盤が付着し、子宮口を覆うかその近くに位置している状態）であると説明し、計画的な帝王切開を勧めた。
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