Offspring sex ratios and reproductive hazards.
نویسندگان
چکیده
منابع مشابه
Was the widespread decline in sex ratios at birth caused by reproductive hazards?
There has been a decline in sex ratio at birth in recent decades in many countries. The question arises whether polluting environmental endocrine disrupters may have been responsible. It is suggested here that we are not (and will not soon become) in a position to know this because: (i) we do not know what those sex ratios would have been doing in the absence of such proposed polluters and (ii)...
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I would like to respond to the comments of Jongbloet et al. (1) on the data of Mocarelli et al. (2). Mocarelli et al. (2) reported on the offspring sex ratios (proportions male) following the explosion at Seveso, Italy, that released 2,3,7,8-tetrachlorodibenzo-pdioxin (TCDD, dioxin) into the environment. Mocarelli et al. (2) categorized matings into the four possible combinations by sex and exp...
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OBJECTIVES To explore any association between paternal tobacco smoking and the offspring secondary sex ratio, as well as the effect of duration and intensity of smoking on gender ratio. METHODS The cross-sectional study was conducted around major public areas within Khartoum, Sudan, between August and September 2008 and involved 458 married Sudanese males with offsprings. The sample consisted...
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that natural selection should favor the ability of animals to modify the sex ratio of their offspring whenever the net fi tness benefi ts of producing sons or daughters vary as a function of parental condition. For example, when males compete strongly for females and have greater variance in reproductive success than females, parents in good condition should invest more in sons. Parents in poor...
متن کاملReproductive effects of male dioxin exposure. The use of offspring sex ratios to detect reproductive effects of male exposure to dioxins.
The Use of Offspring Sex Ratios to Detect Reproductive Effects of Male Exposure to Dioxins Toppari et al. [EHP 104(suppl 4): 741-803(1996)], writing of the possible effects of dioxin, remark that no reproductive disorders in adults have been described after the accident in 1976 in Seveso, Italy. Publications since the submission of this paper put this assertion into perspective. There is good e...
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ژورنال
عنوان ژورنال: Occupational and Environmental Medicine
سال: 1997
ISSN: 1351-0711
DOI: 10.1136/oem.54.1.68-b