Peri-Conceptional undernutrition in twin bearing ewes: Effect on early fetal growth and birth weight

Peri-Conceptional undernutrition in twin bearing ewes: Effect on early fetal growth and birth weight

Abstract: A total of 48 Katahdin x Pelibuey multiparous ewes were used to evaluate the effect of nutritional restriction (40 %) before (30 d, RT), after (50 d, TR) or both periods (80 d, RR) compared with a control group on maternal body status, early fetal growth and lamb birth weights. Only twin bearing ewes were selected at d 50 of pregnancy for fetal measurements by ultrasonography and record of birth weight. Compared with control ewes, lower (p < 0.05) weight and body condition score had RT and RR ewes at mating time, likewise, TR and RR ewes at d 50 post-conception. There were mainly differences between fetuses from control and RT ewes, being higher (p < 0.05) the vesicular, abdominal and fetal area, as well as crown-rump length and birth weight for RT fetuses. In conclusión, preconception undernutrition positively altered the early fetal growth and lamb birth weights in hair ewes pregnant with twins.

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Bibliographic Details
Main Authors: Vicente-Pérez,Ricardo, Osorio-Marín,Yolanda, López-Baca,María A., Avendaño-Reyes,Leonel, Correa-Calderón,Abelardo, Mellado,M., Lara-Rivera,Ana L., Meza-Herrera,Cesar A., Macías-Cruz,Ulises
Format: Digital revista
Language:English
Published: Universidad Juárez Autónoma de Tabasco, Dirección de Investigación y Posgrado 2017
Online Access:http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S2007-90282017000300419
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Summary:Abstract: A total of 48 Katahdin x Pelibuey multiparous ewes were used to evaluate the effect of nutritional restriction (40 %) before (30 d, RT), after (50 d, TR) or both periods (80 d, RR) compared with a control group on maternal body status, early fetal growth and lamb birth weights. Only twin bearing ewes were selected at d 50 of pregnancy for fetal measurements by ultrasonography and record of birth weight. Compared with control ewes, lower (p < 0.05) weight and body condition score had RT and RR ewes at mating time, likewise, TR and RR ewes at d 50 post-conception. There were mainly differences between fetuses from control and RT ewes, being higher (p < 0.05) the vesicular, abdominal and fetal area, as well as crown-rump length and birth weight for RT fetuses. In conclusión, preconception undernutrition positively altered the early fetal growth and lamb birth weights in hair ewes pregnant with twins.

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