ИНФОРМАЦИОННАЯ ЗНАЧИМОСТЬ ПАРАМЕТРОВ УЛЬТРАЗВУКОВОГО ИССЛЕДОВАНИЯ ПЛОДА И ЭКСТРАЭМБРИОНАЛЬНЫХ СТРУКТУР С 8-Й ПО 11-Ю НЕДЕЛЮ БЕРЕМЕННОСТИ

The  purpose  of this  research  was  to  define  the  importance   of ultrasound   parameters of fetus  pathology  and extra-embryo  structure in the first trimester  of pregnancy.  We have studied 369 pregnancies with 8 to 11 weeks of gestation. We used original metod to define index of correlation between embryonic crown — rump length (CRL) and the length of heart (the distance  between the chin and crown). The normal index values are in a range 1,6–2,6. We used factory mathematic analysis and received results.  The most informative parameters are: aplasia of yolk sack, wrong differential structure of anatomical embryo, wrong correlation between the length of head to body of fetus, discordance between CRL to period of gestation. Least informative ultrasound  parameters are: tonus miometrium, poor vascularisation  of corpus luteum.  These results allow to segregate the group of high pathology of fetus.