Y Danielli

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Progestin-impregnated (250 mg medroxyprogesterone) vaginal sponges (PIVS) were inserted 6-7 days post-insemination and removed on the 17th day. Pregnancy was determined by milk progesterone on the 21-24 day post-insemination. It was found that in 52 cows which did not receive PIVS, the rate of false diagnosis of pregnancy was 21%. In 30 cows treated with(More)
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