{"title":"波多黎各的人类生育能力。","authors":"C TIETZE","doi":"10.1086/220090","DOIUrl":null,"url":null,"abstract":"The gross reproduction ratio of Puerto Rico has remained unchanged at a level of 2.5 from 1899 to 1940. This has resulted from a decline of marital fertility of about 25 per cent, balanced by an increased frequency of the married state. The decline of marital fertility has been greater in urban than in rural areas. Many Puerto Ricans are aware of population pressure in their island, and for the last twelve years a number of governmentally or privately sponsored contraceptive services have been in operation. Voluntary sterilization is also widely practiced.","PeriodicalId":86247,"journal":{"name":"The American journal of sociology","volume":"53 1","pages":"34-40"},"PeriodicalIF":0.0000,"publicationDate":"1947-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1086/220090","citationCount":"4","resultStr":"{\"title\":\"Human fertility in Puerto Rico.\",\"authors\":\"C TIETZE\",\"doi\":\"10.1086/220090\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The gross reproduction ratio of Puerto Rico has remained unchanged at a level of 2.5 from 1899 to 1940. This has resulted from a decline of marital fertility of about 25 per cent, balanced by an increased frequency of the married state. The decline of marital fertility has been greater in urban than in rural areas. Many Puerto Ricans are aware of population pressure in their island, and for the last twelve years a number of governmentally or privately sponsored contraceptive services have been in operation. Voluntary sterilization is also widely practiced.\",\"PeriodicalId\":86247,\"journal\":{\"name\":\"The American journal of sociology\",\"volume\":\"53 1\",\"pages\":\"34-40\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1947-07-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1086/220090\",\"citationCount\":\"4\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"The American journal of sociology\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1086/220090\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"The American journal of sociology","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1086/220090","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
The gross reproduction ratio of Puerto Rico has remained unchanged at a level of 2.5 from 1899 to 1940. This has resulted from a decline of marital fertility of about 25 per cent, balanced by an increased frequency of the married state. The decline of marital fertility has been greater in urban than in rural areas. Many Puerto Ricans are aware of population pressure in their island, and for the last twelve years a number of governmentally or privately sponsored contraceptive services have been in operation. Voluntary sterilization is also widely practiced.
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