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OBJECTIVE	The aim of our study was to measure the volume of gestational sac and amniotic sac in physiological pregnancies and missed abortion .
OBJECTIVE	We wanted to create nomograms for individual weeks of gestation .
METHODS	Retrospective cohort study .
METHODS	Institute for the Care of Mother and Child , Prague .
METHODS	The study randomized 413 women after spontaneous conception .
METHODS	The patients were divided into two groups : women with physiological pregnancy and childbirth in the period ( 374 ) , and women with pregnancy terminated by missed abortion .
METHODS	Both groups were performed measurement volume of gestational and amniotic sac in the first trimester of pregnancy .
METHODS	Analysis was performed using 4D View software applications , and volume calculations were performed using VOCAL ( Virtual Organ Computer Aided anaLysis ) .
RESULTS	We have created the first in the Czech Republic nomograms volumes of gestational and amniotic sac in physiological pregnancies and missed abortion .
RESULTS	We performed a correlation between the size of gestational sac and prosperity pregnancy .
CONCLUSIONS	In our study we found no correlation between the volume of gestational sac and the development of the pregnancy .

