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  • Title: Blastocyst development on days 10 or 14 after consumption of zearalenone by sows on days 7 to 10 after breeding.
    Author: Diekman MA, Long GG.
    Journal: Am J Vet Res; 1989 Aug; 50(8):1224-7. PubMed ID: 2528931.
    Abstract:
    Sixteen primiparous sows were bred and fed either a control ration (n = 8) or a diet containing purified zearalenone (n = 8; 1 mg/kg of body weight) from days 7 to 10 after breeding. On day 7 after breeding, the jugular vein of each sow was cannulated and blood was collected at 20-minute intervals for 4 hours before feeding and 4 hours after feeding. On day 10 after breeding, blood samples were collected from 4 control sows and 4 zearalenone-fed sows at 20-minute intervals for 4 hours before collection of blastocysts. A similar blood sampling schedule was followed for the remaining 4 control and 4 zearalenone sows on day 14 after breeding. On day 10 after breeding, spherical blastocysts were recovered from all control sows and from 3 of 4 zearalenone-treated sows. Average diameter of blastocysts from zearalenone-treated sows were similar to that of control sows. On day 14 after breeding, blastocysts were recovered from all control sows and 3 of 4 zearalenone-treated sows. Blastocysts from the control sows were filamentous, whereas blastocysts from zearalenone-treated sows were fragmented and contained foci of necrosis. Incidence of luteinizing hormone (LH) secretory spikes per sow was less (P less than 0.01) in zearalenone-treated sows (0.25 +/- 0.25/4 h) than control sows (1.75 +/- 0.25/4 h) on day 10 after breeding. Incidence of follicle-stimulating hormone (FSH) secretory spikes was similar (P = 0.45) among treatments on days 7, 10, and 14 after breeding.(ABSTRACT TRUNCATED AT 250 WORDS)
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