Milk samples were collected from 180 heifers from 20 herds around parturition to study the prevalence and persistence of intramammary infection (IMI). A total of 3382 quarter milk samples was collected each week from 4 wk before parturition to 4 wk after parturition. Staphylococcus chromogenes, the most commonly found bacterial species before parturition, was isolated from 15% of all quarters. ...

Pregnant Charles Foster rats were subjected to amniotic sac puncture on day 15 of gestation and the effect was observed on parturition. All the control rats as expected delivered on day 22 of gestation. In the group where all the sacs were punctured, only 12.5% rats delivered on day 22 while rest either failed to deliver (62.5%) or died (25%). In the group with unpunctured sacs at vaginal ends,...

Konigsson, K. 2001. Induced Parturition and Retained Placenta in the Cow. Inhibition of prostaglandin F z a synthesis and antibiotic therapy Doctor's dissertation. In order to study rapid changes in 1 5-kctodihydro-PGF2, (PG-metabolite), in the period preceding parturition in cattle, prc-term parturition was induced by dcxamcthasonc injection in four heifers on days 254 to 265 in gestation. Blo...

Forty-six beef heifers (16 to 23 mo) of two biological types (small = Red Poll-sired, large = Charolais-sired) were individually fed from d 90 of gestation through parturition to evaluate the effects of nutritional restriction on plasma LH and steroid hormone concentrations. Heifers were allotted to one of two nutritional treatments to achieve a BW reduction (loss, fed at 1% of BW/d) or to main...

PURPOSE Pregnancy-induced analgesia develops during late pregnancy, but it is unclear whether this analgesia is effective against neuropathic pain. The detailed molecular mechanisms underlying pregnancy-induced analgesia have not been investigated. We examined the antinociceptive effect of pregnancy-induced analgesia in a neuropathic pain model and the expression of tumor necrosis factor (TNF)-...

Evaluating how management practices influence the population dynamics of ungulates may enhance future management of these species. For example, in mule deer (Odocoileus hemionus), changes in male/female ratio due to male-biased harvest may alter rates of pregnancy, timing of parturition, and synchrony of parturition if inadequate numbers of males are present to fertilize females during their fi...

Respiratory rate (RR) and rectal temperature (RT) of seven crossbred, second-litter sows and 11 crossbred gilts and rates of sitting and standing activity of 10 sows and gilts were measured from about 109 days of gestation to 5 days after farrowing at thermoneutral (T, 20.5 C) or hot (H, 29.8 C) ambient temperatures. Respiratory rate and RT were higher in heat-stressed sows and gilts (P~.05) be...

The process of placental separation is not completely understood. In domestic animals, especially cattle, it is important that expulsion of the fetal membranes takes place in a timely manner in order to achieve maximal reproductive efficiency. The activity of the matrix-metalloprotease (MMP) family of proteases is known to be reduced in placentomes from cases of retained placenta. Members of th...