NORMAL 1ST TRIMESTER
Long axis pelvic view demonstrating an intrauterine pregnancy with yolk sac and visible fetal heart beat
Fetal pole with heart beat and yolk sac deep to it
SUBCHORIONIC HAEMORRHAGE
Long axis pelvic view - gestational sac with fetal pole just about visible and subchorionic haemorrhage cranial to it
Subchorionic haemorrhage measured in pelvic long axis, gestational sac is caudal to it
ECTOPIC PREGNANCY
Ruptured ectopic pregnancy with free fluid in pouch of Douglas