MATERNAL UNDERNUTRITION DURING MID-PREGNANCY IN SHEEP - VARIABLE EFFECTS ON PLACENTAL GROWTH
MATERNAL UNDERNUTRITION DURING MID-PREGNANCY IN SHEEP - VARIABLE EFFECTS ON PLACENTAL GROWTH
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DOI：
10.1017/s002185960006809x
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发表时间：
1992-02-01
影响因子：
2
通讯作者：
HOSKING, BJ
中科院分区：
文献类型：
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作者：
MCCRABB, GJ;EGAN, AR;HOSKING, BJ
在澳大利亚鹿园的Mount Derrimut田间试验站，连续两年（1986年和1987年）分别测定了妊娠第30天至第96天母体营养不良对单胎母羊胎盘生长的影响。 在第一个实验中，在妊娠第96天测量的胎盘生长减少（473-nu. 596 g），而在第二个，胎盘生长增加（600-nu. 496 g）。 在两个实验中，孕妇营养不良对妊娠第96天的胎儿体重及其线性尺寸没有显著影响。 两项研究之间动物和实验条件的唯一显著差异是交配时母羊的活重，为c。第二次试验比第一次试验高10 kg（P < 0.01）。 两个实验之间的身体状况评分和在各自的营养治疗期间的状况评分的变化没有显着差异。 结果表明，母体的体重，可能是身体储备的条件评分无法量化，保护，甚至提高胎盘生长在一段时间的母体营养不良。
The effect of maternal undernutrition between the 30th and 96th day of pregnancy on placental growth in single-bearing ewes was determined separately in two experiments in consecutive years (1986 and 1987) at Mount Derrimut Field Station, Deer Park, Australia. In the first experiment, placental growth measured on the 96th day of pregnancy was reduced (473-nu. 596 g) by maternal undernutrition, while in the second, placental growth was increased (600-nu. 496 g). Foetal weight and its linear dimensions on the 96th day of pregnancy were not significantly affected by maternal undernutrition in either experiment. The only significant difference in the animals and experimental conditions between the two studies was the liveweight of the ewes at mating, which was c. 10 kg higher in the second experiment compared with the first (P < 0.01). Body condition score and the change in condition score during the respective nutritional treatments were not significantly different between the two experiments. The results suggest that maternal liveweight, possibly body reserves not quantifiable by condition score, protects and even enhances placental growth during a period of maternal undernutrition.