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Rima Figure 4 (29 August). Right ovary with 18 mm follicle and 15 mm corpus luteum (CL) just below follicle. Presence of CL is consistent with luteal phase of cycle.

Note: 30 August exam revealed 20 mm follicle on Right Ovary indicating maturing follicle and possible approaching estrus. Ara and Rima were introduced based on the increasing size of the observed follicle without breeding. The lack of breeding activity can be explained by the persistence of the luteal structure on Rima’s right ovary (Figure 5). Therefore, it is important to evaluate not only follicular size, but also any evidence of persistent luteal tissue. Serum progesterone assay results can be used to support the ultrasound findings. more »

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