Keywords: Pregnancy of crown-rump length of 5.3mm (6 weeks 1 day).gif Vaginal ultrasonography of a gestational sac with its fluid showing as black in the image because it's anechoic A human embryo is seen to the right having a crown-rump length of 5 3mm corresponding to a gestational age of 6 weeks and 1 day according to local reference data There is a spherically shaped yolk sac just to the left of it Fetal heartbeat is discernible in the center of the embryo as a flickering area 2014-04-13 own Mikael Häggström gallery of 2014 cc-zero Uploaded with UploadWizard Animated ultrasonography of human embryo Vaginal ultrasonography |