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ELEPHANT MATING WITH FEMALE - Elephant Mate/ Breading Video
Additional blood samples were collected daily throughout the nonluteal phase in one National Zoological Park and all six Dickerson Park Zoo elephants for a total of 21 interluteal periods. During the nonluteal phase, serum LH was elevated for 1—2 days during anLH and ovLH surges with no differences in peak concentration between the two surges. For the other hormones, peak and baseline concentrations were determined for each individual by an iterative process in which high values were excluded if they exceeded the mean plus 2 standard deviations. Similarly, serum estradiol concentrations varied throughout the estrous cycle. The highest concentration within a group of elevated samples was considered the peak. In sum, there were no clear differences in associated hormone secretory patterns between the anLH and ovLH surge. To determine whether differences existed in secretory patterns between the anLH and ovLH surges, daily blood samples were analyzed from 21 nonluteal-phase periods from 7 Asian elephants. To determine hormone differences between the anLH and ovLH surges, means were calculated for each day beginning 10 days before and continuing for 5 days after each surge, and within-day comparisons were made using t-tests. This study evaluated secretory patterns of LH, FSH, progesterone, inhibin, estradiol, and prolactin throughout the estrous cycle in the Asian elephant to determine whether the endocrine milieu surrounding the anLH and ovLH surges differs in a manner that might suggest a reason for this functional difference. Assay sensitivity was 0. No LH surges were observed after the fourth day of the luteal phase or after the transient progesterone drop regardless of the day on which it occurred. Concentrations averaged 4. Assay sensitivity was 1.
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