Word: gonadotrophins
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Dates: during 1950-1950
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...does not come into breeding condition soon after lambing. If she "lambs" in spring, she is seldom ready to start again until the following fall. Working under an Armour grant, Professor Frank X. Gassner of Colorado A. & M. found that carefully measured and timed injections of a gonadotrophin a few weeks after lambing could make 100 ewes produce a fall crop of 65 to 85 extra lambs. A control group of 25 ewes without hormone injections was given a ram for company, but only one of them produced an out-of-season lamb...
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