John Deen, Sukumarannair S. Anil y Leena Anil*. 2006. Vo Congreso de Producción Porcina del Mercosur, Río Cuarto. *University of Minnesota. www.produccion-animal.com.ar Volver a: Vo Congreso In our analyses we are often driven by averages. It can be average daily gain, average daily feed intake, average temperature in the barn or even average weight of pigs. Yet it is the extremes in each of th...

In dairy cows, milk yield increases rapidly after parturition until a peak at around wk 6 of lactation. However, the description of the shape of the lactation curve is commonly based on weekly average milk yields. For a more detailed analysis of the milk production curve from the very beginning of lactation including the colostral period and the effect of colostrum yield on further lactational ...

Two trials involving a total of 39 grits were conducted to determine the effect of feeding naturally molded and Fusarium roseum inoculated corn on reproductive performance of female swine. Trial 1 involved a comparison of the reproductive performance of gilts fed control and naturally infected moldy corn. The length of estrous cycle, duration of estrus, length of gestation period, and average b...

Results: Less number of infants with growth faltering (p=0.093) and acute gastroenteritis (p=0.135) while more infants crawled, longer period of lactational amenorrhea (p= 0.276) and higher mean maternal weight loss (p=0.152) observed in 6 months EBF group compared to the other two groups. No significant differences in mean serum iron concentration and mean haemoglobin concentration among the t...

In order to investigate whether or not prenatal and lactational exposure to bisphenol A (BPA) affects social behavior in mice, pregnant mice were exposed to 500 μg/kg of BPA daily from embryonic day 0 (E0) until postnatal day 21 (P21). The behavior of offspring was monitored at 11-13 and 13-15 weeks of age using an automated behavior assessment system (IntelliCage). Groups of eight mice were ta...

Butyl paraben (BPB) is an antimicrobial used in a variety of consumer products. Due to widespread human exposure and reported estrogenic activity, the National Toxicology Program quantified internal exposure during critical periods of development. Time-mated female Hsd:Sprague Dawley SD rats were administered 0, 1500, 5000 or 15,000 ppm BPB via NIH-07 feed, ad libitum, from gestation day (GD) 6...

We compared the effects of a single acute dose, or chronic fetal exposure, to 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) on the male reproductive system of the Wistar(Han) rat. Tissue samples were taken from dams on gestation day (GD)16 and GD21, and from offspring on postnatal days (PND)70 and 120. Steady-state concentration of TCDD was demonstrated in the chronic study: body burdens were comp...

Bisphenol A (BPA), a compound of great concern as an estrogenic xenobiotic, was assessed for its ability to cause alteration in the accessory sex organs and spermatogenesis in male offspring exposed preneonatally and neonatally. In a series of experiments focusing on rat sensitivity to gestational and lactational exposure to BPA, we investigated its effects on gestation period and reproductive ...