Sex Ratio of Male Sex Preselected Children Born to Couples with Exclusively Female Offspring
نویسندگان
چکیده
منابع مشابه
Male pygmy hippopotamus influence offspring sex ratio
Pre-determining fetal sex is against the random and equal opportunity that both conceptus sexes have by nature. Yet, under a wide variety of circumstances, populations shift their birth sex ratio from the expected unity. Here we show, using fluorescence in situ hybridization, that in a population of pygmy hippopotamus (Choeropsis liberiensis) with 42.5% male offspring, males bias the ratio of X...
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*Correspondence: Graeme C. Hays, Centre for Integrative Ecology, School of Life and Environmental Sciences, Deakin University, Princes Hwy, Warrnambool, VIC 3280, Australia e-mail: [email protected] The implications of climate change for global biodiversity may be profound with those species with little capacity for adaptation being thought to be particularly vulnerable to warming. A classic...
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There is evidence that the ratio of the length of the 2nd and 4th digit (2D:4D) is negatively related to prenatal and adult concentrations of testosterone. It has also been reported that high levels of testosterone at conception in both fathers and mothers are associated with an increased sex ratio (proportion of males at birth). It follows from these observations that low values of 2D:4D may b...
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IN THE process of conducting a broad range exploratory study of children born to women in state psychiatric hospitals, our data showed there were 343 babies born to schizophrenic women patients in Michigan’s six state hospitals between 1925 and 1964. It was somewhat surprising to find that of these, 148 were male and 186 were female. There were nine whose sex was unrecorded and could not be lea...
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ژورنال
عنوان ژورنال: Archives of Andrology
سال: 1992
ISSN: 0148-5016
DOI: 10.3109/01485019208987689