P1130040

Fig. 1.84: Transrectal image of the eye and braincase of a fetus on Day 151 of gestation. In the anterior aspect of the eye thc caudal wali of the leas (arrows) is depicted.

Fig. 1.85: Longitudinal section through the neck of a fetus or Day 154 of pregnancy. The arches and bodies of three vene brae delineate the spinał canal (S). Behind them shadow arii facts extend into the depth of the image.

Fig. 1.86: Horizontal section through the thorax of a fetus on Day 134 of gestation. The echoes formed by the cross sections through the ribs of both hałves of the chest run in two lines to-wards each other. Between the two lines three cardiac cham-

Fig. 1.87: The heart ratę of cąuinc fetuses (Thoroughbrcd and Standardbred) during pregnancy (adapted from KAHN and Leidl 1987 a).