Premium
The crown‐rump length in early human pregnancy: a reappraisal
Author(s) -
SCHATS R.,
OS H. C.,
JANSEN C. A. M.,
WLADIMIROFF J. W.
Publication year - 1991
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.1471-0528.1991.tb10340.x
Subject(s) - crown rump length , gynecology , follicle , transvaginal sonography , in vitro fertilisation , chart , andrology , medicine , pregnancy , obstetrics , biology , first trimester , gestation , mathematics , statistics , genetics
Summary. The crown‐rump length (CRL) was measured by means of transvaginal sonography in 41 pregnancies resulting from in‐vitro fertilization (IVF). The embryonic CRL could be determined as early as 25 days after follicle aspiration. A reference chart was constructed relating the CRL to the number of days following follicle aspiration. Comparison with the CRL chart by Robinson & Fleming (1975) currently in use revealed that transvaginal sonography allows earlier and more accurate measurement of embryonic CRL.