منابع مشابه
Decreasing quality of semen
produce a measure of relative differences in each country. The figure combines the data for neonatal and postneonatal mortality and shows that England and Wales have a steeper and more consistent gradient of mortality across social classes than Sweden. The width of the "steps" is proportional to each class's share of total live births. The differences in total mortality and its socioeconomic di...
متن کاملEvidence for decreasing quality of semen during past 50 years.
OBJECTIVE To investigate whether semen quality has changed during the past 50 years. DESIGN Review of publications on semen quality in men without a history of infertility selected by means of Cumulated Index Medicus and Current List (1930-1965) and MEDLINE Silver Platter database (1966-August 1991). SUBJECTS 14,947 men included in a total of 61 papers published between 1938 and 1991. MAI...
متن کاملdEcrEasing EntrEprEnEurial Quality
Austrian business cycle theory has been criticized on the basis of “rational expectations.” That is, reasonably high quality entrepreneurs—which are required for economic growth—should be able to foresee the business cycle and thereby avoid making malinvestments. As noted by Evans and Baxendale (2008), this argument ignores the fact that entrepreneurs are heterogeneous in quality. American hous...
متن کاملEvaluating Boar Semen Quality
Determining the initial quality of a boar ejaculate is the first step in semen processing and should ensure that prior to further processing, a high quality artificial insemination dose of semen will be produced. Effective screening methods for ejaculates prior to processing are necessary for improving on farm reproductive performances. Ideally, ejaculates that are thoroughly evaluated prior to...
متن کاملSemen quality of Finnish men.
appropriately trained according to their position and specialty.3 Basic life support training was held to be mandatory for all. The working party recommended that a resuscitation training officer be appointed in every acute hospital solely to ensure that training is implemented and cardiac arrests are regularly audited. It has been shown that cardiac arrest survival can be directly correlated w...
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ژورنال
عنوان ژورنال: BMJ
سال: 1992
ISSN: 0959-8138,1468-5833
DOI: 10.1136/bmj.305.6867.1498-b