The contraceptive efficacy of a self-assembling intra-uterine device in domestic mares

Joone, C.J., Gradil, C.M., Picard, J.D., de Tonnerre, D., and Cavalieri, J. (2021) The contraceptive efficacy of a self-assembling intra-uterine device in domestic mares. Veterinary Journal, 99 (4). pp. 130-136.

[img] PDF (Published Version) - Published Version
Restricted to Repository staff only

View at Publisher Website: https://doi.org/10.1111/avj.13055
 
1


Abstract

Objective The primary aim of this study was to investigate the contraceptive efficacy of a self-assembling uterine device (iUPOD™) in the mare. In addition, the effects of iUPODs on oestrous cyclicity, uterine health and circulating concentrations of cortisol were evaluated.

Methods Domestic mares underwent oestrous monitoring and artificial insemination. After subsequent ovulation, mares underwent either placement (n = 7) or sham placement (n = 7; controls) of an iUPOD device. Devices were left in place for at least 3 months. Pregnancy diagnoses were carried out 14 days postovulation, with any pregnancies terminated at 28 days post-ovulation. All mares underwent weekly blood sampling with or without reproductive examinations throughout the study. Towards the end of the study, multiple serum samples collected over three consecutive days were analysed for concentrations of cortisol. Endometrial biopsies were collected before artificial insemination and during the subsequent breeding season. Endometrial cytology and bacterial cultures were performed before device removal (iUPOD mares) or at the end of the study (control mares).

Results Pregnancies were diagnosed in 0 of 7 iUPOD mares versus 7 of 7 control mares. Placement of iUPODs was associated with extended luteal phases and variable accumulations of intrauterine fluid. Bacterial culture results suggested that the mild endometritis associated with iUPODs was sterile in six of seven mares. Short-term placement of iUPODs had no detrimental effects on endometrial architecture. Mean serum cortisol concentrations were significantly lower in iUPOD mares than control mares.

Conclusion iUPODs represent a promising means of fertility control in the mare.

Item ID: 71120
Item Type: Article (Research - C1)
ISSN: 1532-2971
Keywords: cortisol; endometritis; fertility control; horse; immunocontraception
Copyright Information: © 2021 Australian Veterinary Association
Date Deposited: 09 Dec 2021 02:19
FoR Codes: 30 AGRICULTURAL, VETERINARY AND FOOD SCIENCES > 3009 Veterinary sciences > 300999 Veterinary sciences not elsewhere classified @ 100%
SEO Codes: 10 ANIMAL PRODUCTION AND ANIMAL PRIMARY PRODUCTS > 1099 Other animal production and animal primary products > 109902 Animal welfare @ 50%
10 ANIMAL PRODUCTION AND ANIMAL PRIMARY PRODUCTS > 1099 Other animal production and animal primary products > 109999 Other animal production and animal primary products not elsewhere classified @ 50%
Downloads: Total: 1
More Statistics

Actions (Repository Staff Only)

Item Control Page Item Control Page