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The Development of the Lower Uterine Segment
Author(s) -
Morrison John
Publication year - 1972
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.1972.tb00497.x
Subject(s) - placenta , position (finance) , gestation , obstetrics , pregnancy , medicine , andrology , gynecology , biology , fetus , genetics , finance , economics
Summary: The change in position between the lower placental border and the internal cervical os has been measured serially by compound ultrasonic scanning at different stages of gestation in a group of patients with a relatively low insertion of the placenta. These measurements, in conjunction with the clinical estimation as to whether or not placenta praevia was present at delivery, have been used to calculate the normal pattern of development of the lower uterine segment during pregnancy. Factors which apparently interfere with this pattern of development and the value of this knowledge in relation to placental localisation is presented.