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The Variability of Fetal Lie, Presentation and Position During “Normal” Pregnancy
Author(s) -
Morrison John,
Orr Christopher J. B.,
Teoh Gloria G. C.
Publication year - 1976
Publication title -
australian and new zealand journal of obstetrics and gynaecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.734
H-Index - 65
eISSN - 1479-828X
pISSN - 0004-8666
DOI - 10.1111/j.1479-828x.1976.tb02646.x
Subject(s) - gestation , breech presentation , presentation (obstetrics) , fetal position , fetus , medicine , obstetrics , parity (physics) , pregnancy , position (finance) , incidence (geometry) , gynecology , physics , biology , genetics , finance , particle physics , optics , economics
Summary: The fetal lie, presentation, and position was recorded serially from the 16th week of gestation until delivery in 100 pregnant women. The incidence of these characteristics varied with gestation and parity, with stabilization of fetal lie occurring at the 22nd week in nulliparous patients, and at the 30th week in parous patients; the frequency of longitudinal lie rose from 63% at 16 weeks of gestation to 99% at 32 weeks of gestation. Only 1 persistent breech presentation and 1 persistent transverse lie occurred in the 100 patients. The predominant position in the cephalic presentations was left occipital with a significantly higher incidence in the nullipara. Considerable variability of lie, presentation, and position occurred in serial examinations, and late spontaneous version from breech to vertex occurred in 4 multiparous patients.