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spec: Quite a few studies have concluded that the blood types of the mother and the fetus can affect the chance of a spontaneous miscarriage , several have inferred selection against the A allele , and at least one study suggested that natural selection would favor a male population with high frequencies of the O phenotype ( because the fetus would have an ABO phenotype similar to the mother 's ) . Bears may have become much bigger than today and then smaller , or more than one type of bear , of different sizes , may have existed together , as we see in N America today . Five-year plans have become more workable three-year plans . The Inner Tantras of the Nyingma School provide profound methods for realisation in one life-time . The Graduate School has identified some programs that have undergone significant attrition and no longer exhibit the vitality they should . A separate conference is completing work on a 2006 defense appropriations bill . The number of parameters is no longer relevant . The target population of the Farm Inputs Management Survey consisted of all farms in Canada ( excluding the Yukon and Northwest Territories ) that were in operation at the time of the survey . Many Mallard in the East are of domestic origin or have bred with domestic ducks . What does your son or daughter want from a university or college ?