What would this be talking about? A friend of mine read somewhere that that selenium in the mare's diet increases placental cell size. Is this good, bad, indifferent? I realize it would all depend on the amount of the selenium, but I'm just trying to understand what "increased placental cell size" means.
The research abstract can be viewed here. There is also an article to be found that discusses the research here.
One of the researchers is quoted in the summary as saying: "Overall, this data suggests that maternal diet during the last third of gestation impacts both placental efficiency and colostral IgG. Of course, more research is needed to determine the ramifications of these changes and their mechanisms."
Hammer emphasized these preliminary results should not encourage horse owners to withhold grain from pregnant mares in order to increase IgG.
At the moment, pending further research, it is not clear what - if any - importance increased/decreased placental cell size has. The issues relate to the fact that decreased cell size may mean nothing if the placenta itself is larger; or the cell size larger but the placenta smaller.
As previously commented, more research is required to determine what, if any, significance there is.
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