Fig. 6

Ultrasound images during false pregnancy (FP) in a walrus. A Corpora luteal (round headed line) of false pregnancy shown within dotted crossed lines. The border of the ovary is highlighted by white arrows. B Fluid identified within the uterine horn — dilated to 10.2 cm of a FP walrus. The uterine horn is outlined by 3 white and 1 black arrows