Lactation performance of sows injected with growth hormone-releasing factor during gestation and(or) lactation
Article Abstract:
A study on pregnant and lactating sows indicated that of exogenous administration of the growth hormone-releasing factor (GRF) decreased feed consumption in lactating sows without affecting their milk production or litter performance. The sows in the experimental groups were administered GRF either during pregnancy or during lactation or during pregnancy and lactation both. Comparison of traits, such as production and composition of milk, feed-intake by the sows and the growth rate of the new born pigs was undertaken. Decrease in feed consumption may be due to better protein utilization by sows treated with GRF during lactation.
Publication Name: Journal of Animal Science
Subject: Zoology and wildlife conservation
ISSN: 0021-8812
Year: 1992
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Ovarian follicular changes after weaning in sows
Article Abstract:
An experimental study was conducted to investigate post-weaning developments in ovarian follicle of sows after 28-31 days of lactation. The experiment also investigated if the largest ovarian follicle, at 48-72 hours after weaning, was included in the ovarian population. Analysis of results obtained from unilateral ovariectomy of sows provided evidence of stimulation of ovarian steroidogenisis six hours after weaning. Insulin like growth factor-I (IGF-I) was not found to have a significant role in either progesterone or estradiol production, in 24 hours immediately after weaning.
Publication Name: Journal of Animal Science
Subject: Zoology and wildlife conservation
ISSN: 0021-8812
Year: 1992
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Relationship of fetal position within the uterus to fetal weight, placental weight, testosterone, estrogens, and thymosin beta4 concentrations at 70 and 104 days of gestation in swine
Article Abstract:
A study was conducted to determine the influence of sex of adjacent fetus in the uterus, on placental and fetal weight and on estrogen, fetal concentration of testosterone and thymosine beta4. A comparative study of the hormonal mechanism in the fetus of pigs and rats was also undertaken. No relationship between fetal growth and hormonal factors from surrounding fetus, was identified. Weight of a fetus surrounded by two opposite sex fetus was found to be less than weight of the fetus surrounded by same sex fetus.
Publication Name: Journal of Animal Science
Subject: Zoology and wildlife conservation
ISSN: 0021-8812
Year: 1992
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