Energy balance influences number of ovulations rather than embryo quality in the pig

The present study was undertaken to examine the effect of feed restriction on ovulation rate and in vivo blastocyst development in gilts and sows. In the first experiment, gilts were feed restricted (1 vs. 2.5 times maintenance requirement) during the luteal and follicular phases before ovulation. I...

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Bibliographic Details
Published in:Theriogenology 2016-09, Vol.86 (4), p.1008-1013
Main Authors: Langendijk, Pieter, Chen, Tai-Yuan, McIlfatrick, Stephen M., Nottle, Mark B.
Format: Article
Language:English
Subjects:
Animals
Blastocyst - physiology
Embryo
Energy balance
Energy Metabolism - physiology
Female
Food Deprivation - physiology
Ovulation
Ovulation - physiology
Parity
Pregnancy
Swine
Swine - embryology
Swine - physiology
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Summary:The present study was undertaken to examine the effect of feed restriction on ovulation rate and in vivo blastocyst development in gilts and sows. In the first experiment, gilts were feed restricted (1 vs. 2.5 times maintenance requirement) during the luteal and follicular phases before ovulation. In the second experiment, primiparous sows were feed restricted (ad lib vs. 60% thereof) during the last week of lactation before weaning. Gilts and sows were slaughtered at 5 days after ovulation to determine ovulation rate and blastocyst development. Blastocysts were also differentially stained to determine the effect of feed restriction on total, trophectoderm, and inner cell mass cell numbers. In both experiments, feed restriction delayed ovulation and reduced the number of ovulations in gilts (14.8 ± 1.3 vs. 12.0 ± 0.2; P 
ISSN:0093-691X
1879-3231
DOI:10.1016/j.theriogenology.2016.03.029