Endocrine Changes in the Pig During Late Pregnancy, Parturition and Lactation1

Abstract
Peripheral plasmal levels of progestins, corticosteroids, and estrogens were determined in gilts beginning approximately 2 weeks prior to and at various intervals during parturition. as well as for up to 37 days postpartum in Yorkshire-Hampshire cross pigs. In addition, the same steroids were determined in 2 animals which aborted due to leptospirosis infection. Blood was obtained via a catheter chronically implanted in the lesser saphenous vein.

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