妊娠时限异常妊娠时限异常Abnormal Duration of Pregnancy 程苾恒程苾恒武汉大学人民医院产科武汉大学人民医院产科1第一节自然流产spontaneousabortion第二节早产prematuredelivery第三节过期妊娠post-termpregnancy2自自然然流流产产3SpontaneousabortionDefinition重点！ClassificationEpidemilogyEtiologyDiagnosis难点！Therapy重点！4DefinitionSpontaneous abortion:terminationofpregnancybeforethe28thweekofgestation，theweightoffetuslessthan1000g自然流产自然流产：妊娠不足28周，胎儿体重小于1000g而终止者（美国）妊娠满20周以前，或体重小于500gMiscarriageVSAbortion5ClassificationEarlyabortion12weeksLateabortion12weeks28weeksArtificialab
