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Ultrasonographic measurement of the yolk sac
Author(s) -
CROOIJ M. J.,
WESTHUIS M.,
SCHOEMAKER J.,
EXALTO N.
Publication year - 1982
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.1471-0528.1982.tb05060.x
Subject(s) - yolk sac , crown rump length , embryo , yolk , medicine , embryogenesis , pregnancy , anatomy , obstetrics , biology , fetus , first trimester , ecology , genetics , microbiology and biotechnology
Summary. Ultrasonographic measurements of the yolk sac were made during first trimester in 100 pregnancies. The results were related to the crown‐rump length of the embryos and showed an increase in size from 7 to 11 weeks menstrual age. A possible relation between anomalies in yolk sac development and embryonic development was studied in six patients by means of serial weekly Ultrasonographic examinations. In one case with absence of the yolk sac embryonic death occurred at 10 weeks menstrual age; the embryo had spina bifida.