Biometry of early pregnancy with transvaginal sonography

摘要: A prospective cross-sectional study was performed in 248 pregnant women between 5 and 12 weeks' menstrual age with transvaginal sonography to establish biometric charts of the gestational sac, embryonic crown-rump length biparietal diameter, amniotic sac yolk be used for assessment prediction pregnancy failure. Polynomial regression analysis applied demonstrated a statistically significant positive correlation that could described all cases as quadratic function, measurements exclusion sac. Centile both growth models dating were tabulated. The interrelationship different measurements, including length, diameter also evaluated produce age-independent charts. model found have mean values similar those transabdominal studies. 95% reference interval was, however, 8.4 days, which not lower than reported most It concluded more able abdominal route allow measurement very early gestation, but did yield greater accuracy predicting age.