Musser, R.E.Smith, J.W.IIBurum, L.L.Samland, C.J.Davis, Duane L.Goodband, Robert D.Tokach, Michael D.Nelssen, Jim L.Rathbun, Theresa J.Dritz, Steven S.2010-03-022010-03-022010-03-02http://hdl.handle.net/2097/2774Parity-four sows were fed either 4.0 Ib/d (control, n = 6) or 14.0 Ib/d (high, n = 9) of feed from d 29 to 45 of gestation. On d 45 of ges~tion, sows were slaughtered and uteri collected for fetal and placental measurements. High-feed-intake sows gained more weight from. d 29 to 45 compared to control sows. Providing feed in excess of established requirements to gestating sows from d 29 to 45 of gestation increased IGF-I concentrations in maternal plasma and decreased crown-rump length variation of the fetus. Increased feed intake resulted in a removal of the correlation between average fetal weight and number of fetuses per sow. We postulate that the increased maternal IGF-I or other maternal responses to high feed intake altered the maternal limit on fetal growth at this stage of gestation.SwineFeed intakeFetal growthInsulin-like growth factorConference paper