medical notes

Apr 17th, 2015
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POSTTERM PREGNANCYDefinitionsThe terms postterm, prolonged, postdates, and postmature are often loosely used interchangeably to signify pregnancies that have exceeded a duration considered to be the upper limit of normal.Postmature should be used to describe the infant with recognizable clinical features indicating a pathologically prolonged pregnancy.Postdates probably should be abandoned, because the real issue in many postterm pregnancies is "post-what dates?" Therefore, postterm or prolonged pregnancies are the preferred expressions for extended pregnancies, and "postmature" is reserved for a specific clinical syndrome. Importantly, few infants from prolonged pregnancies are postmature, and indiscriminate use of this term can falsely imply a pathologically prolonged pregnancyThe standard internationally recommended definition of prolonged pregnancy is 42 completed weeks (294 days) or more from the first day of the last menstrual period.Thus, technically speaking, prolonged pregnancy could begin either on day 294 or on day 295 following the onset of the last menses.Postterm pregnancy is defined as a pregnancy that extends to 42 0/7 weeks and beyondEpidemiologyThe reported frequency of postterm pregnancy is approximately 3-12%.However, the actual biologic variation is likely less since the most frequent cause of a postterm pregnancy diagnosis is inaccurate dating.Contradictory results have been found concerning the significance of a variety of maternal demo

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