1876年至1981年的美国父亲年龄数据。

Neurofibromatosis Pub Date : 1988-01-01

V M Riccardi

{"title":"1876年至1981年的美国父亲年龄数据。","authors":"V M Riccardi","doi":"","DOIUrl":null,"url":null,"abstract":"For selected years in the time span of 1876 through 1981, mean average paternal ages are itemized and the methods for the calculation of these figures are illustrated. For this time period, mean average paternal ages dropped from a high of 36.9 years to 28.5 years in 1981. This change was accounted for by an absolute and relative decrease in the number of births to older fathers and by an absolute and relative increase in births to younger fathers.","PeriodicalId":77754,"journal":{"name":"Neurofibromatosis","volume":"1 2","pages":"93-9"},"PeriodicalIF":0.0000,"publicationDate":"1988-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"American paternal age data for selected years from 1876 to 1981.\",\"authors\":\"V M Riccardi\",\"doi\":\"\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"For selected years in the time span of 1876 through 1981, mean average paternal ages are itemized and the methods for the calculation of these figures are illustrated. For this time period, mean average paternal ages dropped from a high of 36.9 years to 28.5 years in 1981. This change was accounted for by an absolute and relative decrease in the number of births to older fathers and by an absolute and relative increase in births to younger fathers.\",\"PeriodicalId\":77754,\"journal\":{\"name\":\"Neurofibromatosis\",\"volume\":\"1 2\",\"pages\":\"93-9\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1988-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Neurofibromatosis\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Neurofibromatosis","FirstCategoryId":"1085","ListUrlMain":"","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}

引用次数: 0

摘要

在1876年至1981年期间选定的年份，逐项列出了平均父亲年龄，并说明了这些数字的计算方法。在此期间，父亲的平均年龄从36.9岁的高点降至1981年的28.5岁。这一变化的原因是，高龄父亲的生育数量的绝对和相对减少，而年轻父亲的生育数量的绝对和相对增加。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

微信好友朋友圈 QQ好友复制链接

本刊更多论文

American paternal age data for selected years from 1876 to 1981.

For selected years in the time span of 1876 through 1981, mean average paternal ages are itemized and the methods for the calculation of these figures are illustrated. For this time period, mean average paternal ages dropped from a high of 36.9 years to 28.5 years in 1981. This change was accounted for by an absolute and relative decrease in the number of births to older fathers and by an absolute and relative increase in births to younger fathers.

求助全文

通过发布文献求助，成功后即可免费获取论文全文。去求助

来源期刊

Neurofibromatosis

自引率

0.00%

发文量

期刊最新文献

Optic Pathway Gliomas Exposure of newborn mice to adenosine causes neural crest dysplasia and tumor formation. Summary of patient data from a multidisciplinary neurofibromatosis clinic. Hemimegalencephaly, hemifacial hypertrophy and intracranial lipoma: a variant of neurofibromatosis. Neurofibromatosis in Gothenburg, Sweden. II. Intellectual compromise.