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Induction of oestrus and ovulation in farmed fallow deer (Dama dama) by using progesterone and PMSG treatment



Induction of oestrus and ovulation in farmed fallow deer (Dama dama) by using progesterone and PMSG treatment



Journal of Reproduction and Fertility 81(1): 113-118



Twenty non-lactating fallow does were each treated with an intravaginal progesterone device (CIDR) for 14 days followed by an i.m. injection of 500 i.u. PMSG, 3-4 weeks before the expected start of the natural rut. An additional 7 does received no treatments and were used as controls. Induced oestrus was observed for 19 (95%) of the treated does, the onset occurring between 48 and 76 h after CIDR removal/PMSG administration. Laparoscopic examination 12 days after CIDR removal revealed ovulation rates ranging from 1 to 4 in treated does. Non-ovulating luteinized follicles were also a feature of PMSG treatment and there was a significant inverse relationship between ovulation rate and numbers of luteinized follicles. Only 3 (14.3%) of the treated does conceived at or near the induced oestrus, the remainder returning to oestrus 21-27 days later. Mid-cycle progesterone concentrations were positively related to ovulation rate. All control does showed evidence of a recent single ovulation at laparoscopy, although first oestrus did not occur until 7-15 days later, indicating the occurrence of silent ovulations before the natural breeding season.

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Accession: 001616113

Download citation: RISBibTeXText

PMID: 3668942

DOI: 10.1530/jrf.0.0810113


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