Mark's Astronomy Pictures

                                                                        sweden did a study in 1993, showing that mvd is a multi-factoral polygenic trait.   this means that genetic factors and environmental factors (i. buying viagra online E. Diet, environmental toxins/vaccinations, fitness of body--underweight or overweight) can contribute to how severely mvd will be expressed. what to do when viagra and viagra dont work   the genetic component is quite strong. viagra soft tabs fake   puppies will, on average, tend to follow in their parent's footsteps as to when they will develop mvd, in fact this incidence is somewhere in the 86-88% range in just the first generation. viagra 20mg rezeptfrei bestellen   this means that if both mom and dad are clear of mvd past age 5, about 86-88% of their offspring will still be clear of mvd at approximately age 5 as well. safe take viagra age 20   and this also means that if both parents develop mitral valve disease before age 5, close to 86-88% of their offspring will also develop mvd before age 5. buy indian viagra online   but, approximately 10-15% of their offspring will not follow in their parents footsteps and may develop mvd earlier or later. Take viagra daily dose    below is a graph showing the results of this study. viagra soft tabs fake   the chart on the left explains what intensity murmur each color represents. Viagra side effects men   no murmur is what is hoped for.   the higher the grade, the worse the murmur. canadian prescription drugs viagra   the chart on the right shows the comparison of the mean parental grading. Viagra vision effects   *mean parental grading* is the average of the murmurs of the two parents.   if both parents were grade 1, then the mean parental quality would be 1 + 1 divided by 2 = 1.   if one parent was a grade 1 and the other a grade 2 then 1 + 2 divided by 2 = 1. 5. generic viagra united states   the graph clearly shows the parents that were most affected (had a higher grade mvd murmur) produced more affected offspring (by age 5) than did the parents less affected. buy online viagra                due to this evidence, the geneticists proposed a voluntary protocol which aims to delay the onset of mvd in offspring. cheap viagra uk delivery   this protocol asks for breeders to breed only: ~~~~~~~~ heart protocol ( 1) individual cavaliers that have attained the age of 5 and are subsequently (after age 5) found to still be clear of mvd (regardless of parental status); or (2) cavaliers that have attained the age of 2. generic viagra fast shipping 5 years and are subsequently found to still be clear of mvd, and whose parents both attained the age of 5 years and were subsequently found to be still clear of mvd; and in a way that puts emphasis on long-lived, delayed onset ancestors. ~~~~~~~~ this *cut-off point* of 5 years of age is only a first proposal.   it is hoped that as the incidence of early-onset mvd improves, the cut-off age of 5 will be changed. The cut-off age of 5 was chosen for two reasons:  (1)  dogs that attain the age of 5 still free of mvd are already in the upper 50th percentile--or are in the *better half*, the half which we want to use in our breeding programs. ordering viagra without a prescription   (. canadian viagra generic viagra soft tabs fake Click here to enter main site