02055naa a2200289 a 450000100080000000500110000800800410001902400540006010000170011424501320013126000090026352012190027265000160149165000210150765000140152865000160154265000230155865000180158165000120159965000150161165000150162665000100164165300150165170000170166670000170168377300650170015164822026-01-14       1994    bl uuuu     u00u1 u    #d7 ahttps://doi.org/10.1016/0921-4488(94)90091-42DOI1 aGREEN, D. A.  aCharacterization of feed intake and estradiol-17 β during gestation and lactation in twin-bearing ewes.h[electronic resource]  c1994  aThe role of estradiol-17Betha (E2) in the regulation of feed intake was investigated in two trials. Trial 1, ten twin-bearing Rambouillet ewes (64 kg, breeding weight) were individually fed corn silage ad libitum daily during the last 60 d of gestation and the first 30 d of lactation. Jugular blood samples were collected weekly for E2 analysis. ln trial 2, ovariectomized Rambouillet ewes (64 kg) were administered implants containing Ez (n = 9) or sham implanted (n = 9). Implants were made from three 15-cm lengths of silastic tubing (3.35 mm i.d., 4.65 mm o.d.). Individual daily ad libitum corn silage intake was determined. Feed intake decreased (linear, P&lt0.02; quadratic, P&lt0.02) during gestation and increased (quadratic, P&lt0.01) during lactation. Feed intake decreased as concentrations of E2 in plasma increased (r= -0.46; P &lt 0.01) during gestation. ln trial 2, implantation of E2 decreased feed intake (time X treatment, P&lt0.01). Concentrations of E2 in plasma were higher (P&lt0.01) in E2 than in sham-implanted ewes ( 16.6 Ys. &lt 2 pg/ ml, respectively). Increased concentrations of E2 in plasma during late gestation appeared to be an important factor involved in decreased feed intake.  aFeed intake  aGestation period  aLactation  aRambouillet  aRuminant nutrition  aSheep feeding  aConsumo  aLactação  aNutrição  aOvino  aVoluntario1 aBRINK, D. R.1 aBAUER, M. L.  tSmall Ruminant Researchgv. 13, n. 2, p. 153-158, Mar. 1994.