What question did this study set out to answer?

To determine whether short-term lupin grain supplementation administered before and after insemination decreases progesterone levels and increases embryo mortality in Merino ewes.

March 29, 2012Reproduction Fertility and Development

Embryo losses in sheep during short-term nutritional supplementation

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Authors

CVC. ViñolesWorld Agroforestry Centre KGK. M. M. GloverMurdoch University BPB. L. PaganoniDepartment of Primary Industries and Regional Development

Discussion

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Implication

Controlled trial demonstrates that post-insemination lupin supplementation transiently boosts embryo survival in sheep, suggesting sudden nutritional withdrawal impairs late embryonic viability.

Key Points

To determine whether short-term lupin grain supplementation administered before and after insemination decreases progesterone levels and increases embryo mortality in Merino ewes.
Artificially inseminated Merino ewes were assigned to three groups: unsupplemented controls (n = 116), ewes supplemented with 500 g/day lupin grain for 6 days pre-insemination (Lupin6, n = 112), and ewes supplemented from 6 days pre- until 15 days post-insemination (Lupin6+15, n = 122).
Circulating progesterone, insulin, IGF-I, and leptin concentrations were monitored across the first 17 days of gestation, and embryo losses were assessed across Days 10–17 and Days 17–30.
Lupin6+15 ewes exhibited elevated insulin and IGF-I concentrations on Days 5, 12, and 17 relative to Lupin6 and Control groups, without major differences in progesterone concentrations among groups over the first 17 days.
Embryo losses between Days 10 and 17 were lower in the Lupin6+15 cohort than in Lupin6 and Control cohorts, but embryo mortality subsequently reversed and increased between Days 17 and 30 following a Day 17 decline in leptin levels.

Cite This Study

Viñoles et al. (2012) studied this question.

synapsesocial.com/papers/6a85248dca39fc72e8c2a350 https://doi.org/10.1071/rd11281

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Implication

Controlled trial demonstrates that post-insemination lupin supplementation transiently boosts embryo survival in sheep, suggesting sudden nutritional withdrawal impairs late embryonic viability.

Embryo losses in sheep during short-term nutritional supplementation

Discussion

Member takes

Implication

Key Points

Cite This Study

Embryo losses in sheep during short-term nutritional supplementation

Discussion

Member takes

Implication

Key Points

Cite This Study

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