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DS95: Improving Cow Fertility Through Fish Meal Supplementation

Figure 2. Full regression of the corpus luteum (defined as less than 1 nanogram of progesterone per milliliter of blood plasma) at 48 hours after an injection of PGF2-alpha occurred in fewer lactating dairy cows fed menhaden fish meal at a Florida dairy farm. Twenty-four out of 25 cows (96%) fed a 0% fish meal diet (white box) regressed their corpus luteum normally compared with 22 out of 31 (71%) cows fed a diet of 2.8% menhaden fish meal (black box).