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The extent and antecedents of uncertain gestation
Author(s) -
HALL MARION H.,
CARRHILL ROY A.,
FRASER CYNTHIA,
CAMPBELL DORIS,
SAMPHIER MICHAEL L.
Publication year - 1985
Publication title -
bjog: an international journal of obstetrics and gynaecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.157
H-Index - 164
eISSN - 1471-0528
pISSN - 1470-0328
DOI - 10.1111/j.1471-0528.1985.tb01347.x
Subject(s) - gestation , population , obstetrics , gestation period , medicine , pregnancy , statistics , mathematics , biology , environmental health , genetics
Summary. The extent and genesis of uncertainty of gestation has been studied in a total obstetric population, using in all cases a best clinical estimate of gestation made according to a specific protocol. In 73·2 % of patients, the estimate was assessed as certain, in 19·7% as approximate, and in 7·1% as uncertain. Uncertainty assessed in this way has several antecedents, and coding of only one of these (presence or absence of a precise date for the last menstrual period) is insufficient in data to be used for research in which gestation length is to be used as a variable.