Effects of maternal nutrient restriction followed by realimentation during early and mid-gestation in beef cows. II. Placental development, umbilical blood flow, and uterine blood flow responses to diet alterations

Theriogenology
L E CamachoK A Vonnahme

Abstract

The objectives were to examine the effects of maternal nutrient restriction followed by realimentation during early to mid-gestation on placental development and uterine and umbilical hemodynamics in the beef cow. On day 30 of pregnancy, multiparous, non-lactating beef cows (620.5 ± 11.3 kg) were assigned to 1 of 2 dietary treatments: control (C; 100% National Research Council [NRC] recommendations; n = 18) and restricted (R; 60% NRC; n = 30). On day 85, cows were slaughtered (C, n = 6; R, n = 6), remained on control (CC; n = 12) and restricted (RR; n = 12), or were realimented to control (RC; n = 11). On day 140, cows were slaughtered (CC, n = 6; RR, n = 6; RC, n = 5), remained on control (CCC, n = 6; RCC, n = 5), or were realimented to control (RRC, n = 6). On day 254, all remaining cows were slaughtered. Heart rate and umbilical and uterine hemodynamics [blood flow, resistance index (RI), and pulsatility index (PI)] were determined via Doppler ultrasonography. As expected umbilical blood flow increased and fetal heart rate decreased as gestation advanced. Umbilical PI in RRC cows was less (P = 0.01) compared to RCC and CCC. During late gestation, RCC cows had greater (P = 0.02) ipsilateral and total uterine blood flow vs. CC...Continue Reading

References

Mar 1, 1992·Clinical Obstetrics and Gynecology·M Y Divon, H W Hsu
Apr 1, 1974·Endocrinology·R ResnikG Meschia
Jun 1, 1995·Journal of Animal Science·L P Reynolds, D A Redmer
Jun 1, 1995·Journal of Animal Science·S P Ford
Mar 12, 2005·The Journal of Physiology·Lawrence P ReynoldsJoel S Caton
Jan 28, 2006·The Journal of Physiology·A L FowdenM Constancia
Feb 14, 2006·The Journal of Physiology·Lawrence P ReynoldsThomas E Spencer
Feb 8, 2007·The American Journal of Clinical Nutrition·Frederick C Battaglia
Jun 27, 2014·Domestic Animal Endocrinology·C G HartC O Lemley

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