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Sumatran Rhino Reproductive Evaluation
Sungai Dusun, Malaysia
Date of exams: 29 August, 30 August, 3 September and 4 September 2001

Species ______________SB# __Sex___ Name___Age

Dicerorhinus sumatrensis        7           F           Rima      ~22+

Captive years without reproducing: 14

Recent breeding activity: Regular breeding at ~21 day intervals (last breeding with Ara on 30 July 2001).

Progesterone profile: Regular 21 day cyclical pattern.

Hormone manipulations: None

Purpose of exam: Examine for possible early pregnancy and pathology. Although Rima’s serum P4 is declining, it was still elevated after 29 days so we were hopeful to possibly identify an early pregnancy.

Brief Summary of Findings:

Rima was not pregnant. We did identify several endometrial cysts (Figures 1 and 2) present in Rima’s uterus — one of which was located in the distal right uterine horn and measured 22 mm (Figure 2). There was evidence of follicular activity and ovulation with luteal tissue present, indicating that despite some minor pathology Rima is apparently cycling normally (Figures 3, 4 and 5) more »

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