[Comparison of vaginal and abdominal ultrasound measurements with embryologic growth curves in early pregnancy].
Body lengths and chorionic diameters of 225 early pregnancies with known fertilisation age, measured by transvaginal sonography (TVS), were compared with measuring results of measurements from abdominal ultrasound and of embryological specimen from the literature. The TVS measuring results were made according to the Carnegie classification. It is shown that the growth curve obtained by TVS is very similar to valid embryological growth curves, although the "Greatest Length" (GL) is measured by sonography not the Crown-Rump-Length (CRL). Between the sixth and eighth gestational week, the TVS curve shows strong resemblance to abdomino-sonographical curves. After that period, the TVS results tend to be systematically lower. The earliest TVS measurement of the human embryo in possible in the sixth gestational week, one week earlier than with abdominal ultrasound. There is a good correlation between the development of a structure and its earliest detection by TVS, active movements of the embryo can even be shown earlier than assumed by embryologists (stage 20/ninth week of gestation). Due to terminological reasons, in ultrasound the established term "Crown-Rump-Length" should be replaced by "Greatest Length". In a TVS-examination of an embryo (gestational weeks 4 to 11), morphological criteria must be additional contributions to the determination of maturity and integrity of a pregnancy. The application of the specimen-derived Carnegie classification to TVS measurements seem to be possible, as well as the utilization of TVS results in embryology.
Böhmer
S
S
Frauenklinik der Medizinischen Hochschule Hannover.
Bruhns
T
T
Degenhardt
F
F
Drews
U
U
Schneider
J
J
D000328:Adult; D002824:Chorionic Villi / Q000000981:diagnostic imaging; D005314:Embryonic and Fetal Development / Q000502:physiology*; D005260:Female; D005324:Fetal Movement / Q000502:physiology; D006801:Humans; D007231:Infant, Newborn; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D011262:Pregnancy Trimester, Second; D012016:Reference Values; D016216:Ultrasonography, Prenatal / Q000379:methods*
Vergleich von vagino- und abdominosonographischen Messergebnissen mit embryologischen Wachstumskurven der Frühschwangerschaft.