Replacing Myths with Facts: Sex-Selective Abortion Laws in the United States
Laws banning sex-selective abortion are proliferating in the United States. Eight states have enacted laws prohibiting sex-selective abortion. Twenty-one states and the federal government have considered such laws since 2009. Those laws prohibit the performance of an abortion if sought based on the sex of the fetus and provide for both criminal and civil penalties in most cases.A great deal of misinformation exists regarding sex selection in the United States. In this report, we have identified six inaccuracies commonly associated with sex-selective abortion and laws prohibiting it. They appear, among other places, in statements made by legislators, testimony submitted to legislatures, and reports issued by legislative committees that have considered or adopted laws banning sex-selective abortion.This Report draws on legal research, empirical analysis of U.S. birth data, field-work, and an extensive review of scholarly publications in social sciences, law and other disciplines to replace these myths with facts.The main empirical support for the view that Asian Americans are obtaining sex-selective abortions based on son preference in the United States is from a study by economists Douglas Almond and Lena Edlund published in 2008. That study, using United States census data from 2000, found that when foreign-born Chinese, Indians and Koreans have two girls, the sex ratios at the third birth in those families is skewed towards boys. However, in analyzing more recent data from the 2007 to 2011 American Community Survey (ACS), we found that the sex ratios at birth of foreign-born Chinese, Indians and Koreans are not male-biased when all their births are taken into account. In fact, foreign-born Chinese, Indians and Koreans have proportionally more girls than white Americans.
Sex ratios at birth after induced abortion
Background: Skewed male:female ratios at birth have been observed among certain immigrant groups. Data on abortion practices that might help to explain these findings are lacking. Methods: We examined 1 220 933 births to women with up to 3 consecutive singleton live births between 1993 and 2012 in Ontario. Records of live births, and induced and spontaneous abortions were linked to Canadian immigration records. We determined associations of male:female infant ratios with maternal birthplace, sex of the previous living sibling(s) and prior spontaneous or induced abortions. Results: Male:female infant ratios did not appreciably depart from the normal range among Canadian-born women and most women born outside of Canada, irrespective of the sex of previous children or the characteristics of prior abortions. However, among infants of women who immigrated from India and had previously given birth to 2 girls, the overall male:female ratio was 1.96 (95% confidence interval [CI] 1.75–2.21) for the third live birth. The male:female infant ratio after 2 girls was 1.77 (95% CI 1.26–2.47) times higher if the current birth was preceded by 1 induced abortion, 2.38 (95% CI 1.44–3.94) times higher if preceded by 2 or more induced abortions and 3.88 (95% CI 2.02–7.50) times higher if the induced abortion was performed at 15 weeks or more gestation relative to no preceding abortion. Spontaneous abortions were not associated with male-biased sex ratios in subsequent births. Interpretation: High male:female ratios observed among infants born to women who immigrated from India are associated with induced abortions, especially in the second trimester of pregnancy.
Palaeomicrobiology: current issues and perspectives
Palaeomicrobiology is an emerging field that is devoted to the detection, identification and characterization of microorganisms in ancient remains. Data indicate that host-associated microbial DNA can survive for almost 20,000 years, and environmental bacterial DNA preserved in permafrost samples has been dated to 400,000–600,000 years. In addition to frozen and mummified soft tissues, bone and dental pulp can also be used to search for microbial pathogens. Various techniques, including microscopy and immunodetection, can be used in palaeomicrobiology, but most data have been obtained using PCR-based molecular techniques. Infections caused by bacteria, viruses and parasites have all been diagnosed using palaeomicrobiological techniques. Additionally, molecular typing of ancient pathogens could help to reconstruct the epidemiology of past epidemics and could feed into current models of emerging infections, therefore contributing to the development of appropriate preventative measures.