{"title":"关于人类出生性别比长期变化的说明。","authors":"C R LOWE, T McKEOWN","doi":"10.1136/jech.5.2.91","DOIUrl":null,"url":null,"abstract":"Investigations of secular changes in the live-birth sex ratios of different countries have given conflicting results (Gini, 1908; Russell, 1936; Ciocco, 1938; Strand skov, 1942; Martin, 1943). In general the data are unsatisfactory, either because numbers of births are small, or because of inaccuracies and deficiencies in birth notification. Russell (1936) examined statistics for England and Wales, and drew attention to the decline of the sex ratio of live births between 1841-45 and","PeriodicalId":84321,"journal":{"name":"British journal of social medicine","volume":"5 2","pages":"91-7"},"PeriodicalIF":0.0000,"publicationDate":"1951-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1136/jech.5.2.91","citationCount":"10","resultStr":"{\"title\":\"A note on secular changes in the human sex ratio at birth.\",\"authors\":\"C R LOWE, T McKEOWN\",\"doi\":\"10.1136/jech.5.2.91\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Investigations of secular changes in the live-birth sex ratios of different countries have given conflicting results (Gini, 1908; Russell, 1936; Ciocco, 1938; Strand skov, 1942; Martin, 1943). In general the data are unsatisfactory, either because numbers of births are small, or because of inaccuracies and deficiencies in birth notification. Russell (1936) examined statistics for England and Wales, and drew attention to the decline of the sex ratio of live births between 1841-45 and\",\"PeriodicalId\":84321,\"journal\":{\"name\":\"British journal of social medicine\",\"volume\":\"5 2\",\"pages\":\"91-7\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1951-04-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1136/jech.5.2.91\",\"citationCount\":\"10\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"British journal of social medicine\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1136/jech.5.2.91\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"British journal of social medicine","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1136/jech.5.2.91","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
A note on secular changes in the human sex ratio at birth.
Investigations of secular changes in the live-birth sex ratios of different countries have given conflicting results (Gini, 1908; Russell, 1936; Ciocco, 1938; Strand skov, 1942; Martin, 1943). In general the data are unsatisfactory, either because numbers of births are small, or because of inaccuracies and deficiencies in birth notification. Russell (1936) examined statistics for England and Wales, and drew attention to the decline of the sex ratio of live births between 1841-45 and
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