منابع مشابه
Debate about sperm count decline.
Male fertility potential in terms of semen quality: a review of the past, a study of the present. Data from men in greater Seattle area reveals no downward trend in semen quality: further evidence that deterioration of semen quality is not geographically uniform. Longitudinal study of semen quality in Wisconsin men over one decade. Wis Med J 91:477479 (1992). 15. Lipshultz Ll. 'The debate conti...
متن کاملDecline in sperm count in European men during the past 50 years.
PURPOSE To investigate whether the sperm concentration of European men is deteriorating over the past 50 years of time. MATERIALS AND METHODS We analysed the data published in English language articles in the past 50 years in altering sperm concentration in European men. RESULTS A time-dependent decline of sperm concentration ( r = -0.307, p = 0.02) in the last 50 years and an overall 32.5%...
متن کاملSperm: Down for the Count
Pharmacokinetic and imaging studies in 19 patients receiving liposome-entrapped adriamycin (L-ADM) were carried out within the framework of a Phase I clinical trial (Gabizon et al., 1989a). The formulation of L-ADM tested consisted of 0.2 gM-extruded multilamellar vesicles composed of egg phosphatidylcholine, egg-derived phosphatidyl-glycerol (PG), cholesterol, and ADM intercalated in the fluid...
متن کاملThe debate about p-values
The p-value is the most widely used statistical concept in biomedical research. Recently, there are controversies over its utility and over the possible relationship between p-value misuse and the relatively high proportion of published medical research that cannot be replicated. In this paper, we introduce the p-value in layman's terms and explain its randomness and limitations. However, we al...
متن کاملEnhancing debate about the sexes.
Is it good for there to be both males and females of our species? This question seems highly fanciful, and a long way from the ethical questions that health professionals face on a daily basis. However, philosophical thought experiments like this sometimes help to clarify questions that are of much broader relevance. In this case, the prospect of an all-female planet focuses our attention on wh...
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ژورنال
عنوان ژورنال: Environmental Health Perspectives
سال: 1998
ISSN: 0091-6765,1552-9924
DOI: 10.1289/ehp.106-1533223