OBJECTIVES: The aim of the research was evaluation of the clinical usefulness of chosen ultrasonographic morphological parameters of the yolk sac in the first trimester of unifetal pregnancies. MATERIAL AND METHOD: Analysis has been done on 391 cases of unifetal pregnancies in the first trimester. Parameters of ultrasonographic evaluation: diameter, appearance and size of yolk sac, biometrics and fetal anatomy, confirmation of heart beating. CONCLUSIONS: The yolk sac should be observed in the fifth week or when its biggest size equals to 10 mm in a normal pregnancy. Abnormal morphological appearance of the yolk sac and/or the size over 9 mm suggest serious growth disorders of the fetus or its necrobiosis. The yolk sac, apart from cases of hydatid mole, should be possible to be observed between 5-12 weeks of pregnancy.
OBJECTIVES: The aim of the research was evaluation of the clinical usefulness of chosen ultrasonographic morphological parameters of the yolk sac in the first trimester of unifetal pregnancies. MATERIAL AND METHOD: Analysis has been done on 391 cases of unifetal pregnancies in the first trimester. Parameters of ultrasonographic evaluation: diameter, appearance and size of yolk sac, biometrics and fetal anatomy, confirmation of heart beating. CONCLUSIONS: The yolk sac should be observed in the fifth week or when its biggest size equals to 10 mm in a normal pregnancy. Abnormal morphological appearance of the yolk sac and/or the size over 9 mm suggest serious growth disorders of the fetus or its necrobiosis. The yolk sac, apart from cases of hydatid mole, should be possible to be observed between 5-12 weeks of pregnancy.