What question did this study set out to answer?

To determine whether early maternal nutrition (pre- and post-natal) and short-term dietary supplementation influence ovarian follicle development, endocrine profiles, and ovulation rate in adult Merino ewes.

October 23, 2013ReproductionOpen Access

Follicle development, endocrine profiles and ovulation rate in adult Merino ewes: effects of early nutrition (pre- and post-natal) and supplementation with lupin grain

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Authors

CVC. ViñolesWorld Agroforestry Centre BPB. L. PaganoniDepartment of Primary Industries and Regional Development KMK. P. McNattyVictoria University of Wellington

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Implication

Factorial experiment reveals high early nutrition and acute lupin feeding boost ovulation rate in adult ewes, indicating lasting metabolic control over reproduction.

Key Points

To determine whether early maternal nutrition (pre- and post-natal) and short-term dietary supplementation influence ovarian follicle development, endocrine profiles, and ovulation rate in adult Merino ewes.
Utilized a 2×2 factorial design in adult ewes evaluating early-life nutrition (low vs high) and a 6-day dietary supplement of lupin grain (supplemented vs unsupplemented).
Synchronized estrus using three prostaglandin injections given 7 days apart, feeding the 6-day supplement starting 2 days after the second injection until the third injection.
Tracked follicle dynamics using ultrasonography and measured reproductive hormones, metabolic markers, granulosa cell counts, aromatase activity, and follicular fluid oestradiol.
High early-life nutrition increased the ovulation rate by 25% (1.5 vs 1.2; P<0.05), accompanied by a trend toward lower FSH concentrations (P=0.06) and higher insulin concentrations (P=0.07), without altering antral follicle counts.
Acute lupin supplementation increased granulosa cell numbers in the largest follicle (3.7±0.2 vs 3.0±0.2 million; P<0.05), circulating oestradiol (4.6±0.3 vs 3.9±0.3 pmol/l; P<0.05), and circulating glucose (3.4±0.03 vs 3.3±0.03 mmol/l; P<0.01).

Cite This Study

Viñoles et al. (2013) studied this question.

synapsesocial.com/papers/6a85248dca39fc72e8c2a34e https://doi.org/10.1530/rep-13-0104

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Implication

Factorial experiment reveals high early nutrition and acute lupin feeding boost ovulation rate in adult ewes, indicating lasting metabolic control over reproduction.

Follicle development, endocrine profiles and ovulation rate in adult Merino ewes: effects of early nutrition (pre- and post-natal) and supplementation with lupin grain

Discussion

Member takes

Implication

Key Points

Cite This Study

Follicle development, endocrine profiles and ovulation rate in adult Merino ewes: effects of early nutrition (pre- and post-natal) and supplementation with lupin grain

Discussion

Member takes

Implication

Key Points

Cite This Study

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