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Review Evidence that mammalian sex ratios at birth are partially controlled by parental hormone levels around the time of conception. free! 2008
James WH. · The Galton Laboratory, University College London, Wolfson House, 4 Stephenson Way, London NW 1 2 HE, UK. · J Endocrinol. · Pubmed #18577567 links to free full text
Abstract: An attempt is made to summarize the evidence that the offspring sex ratios (proportions male at birth) of mammals (including man) are causally related to the hormone levels of both parents around the time of conception. Almost all of the cited studies were reported by non-endocrinologists. This being so, it would seem desirable to have comments of endocrinologists on this topic. The purpose of this article is to elicit such comment. Readers are requested to read the accompanying editorial (Clark & Davis 2008) to gain a better perspective of this hypothesis article.
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Article Further support for the hypothesis that parental hormone levels around the time of conception are associated with human sex ratios at birth. 2008
James WH. · The Galton Laboratory, University College London, UK. · J Biosoc Sci. · Pubmed #18471338 No free full text.
Abstract: During the past year, data have been published on the offspring sex ratios of people diagnosed with toxoplasmosis, hepatitis B, and pre- and post-menopausal breast cancer. It is shown here how these offspring sex ratios constitute further support for the hypothesis that mammalian (including human) parental hormone concentrations around the time of conception partially control the sexes of the resulting infants. If this interpretation were correct, then hormonal treatments might be considered for some or all of these conditions. It is intended that anyone who has read the present note and my two previous papers (James, 1996, 2004) should be aware of all the data relating to the hypothesis.
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