| Literature DB >> 5461120 |
Abstract
Entities:
Keywords: Abortion, Spontaneous--etiology; Age Factors; Congenital Abnormalities; Demographic Factors; Diseases; Maternal Age; Neonatal Diseases And Abnormalities; Parental Age; Population; Population Characteristics; Pregnancy Complications; Research Report
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Year: 1970 PMID： 5461120
Source DB: PubMed Journal: Obstet Gynecol ISSN： 0029-7844 Impact factor: 7.661