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Declines in Sex Ratio at Birth and Fetal Deaths in Japan, and in U.S. Whites but Not African Americans
BACKGROUND: The expected ratio of male to female births is generally believed to be 1.05, also described as the male proportion of 0.515. OBJECTIVES: We describe trends in sex ratio at birth and in fetal deaths in the United States, in African Americans and in whites, and in Japan, two industrial co...
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| Autori principali: | , , , , , |
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| Natura: | Artigo |
| Lingua: | Inglês |
| Pubblicazione: |
National Institute of Environmental Health Sciences
2007
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| Soggetti: | |
| Accesso online: | https://ncbi.nlm.nih.gov/pmc/articles/PMC1892130/ https://ncbi.nlm.nih.gov/pubmed/17589604 https://ncbi.nlm.nih.govhttp://dx.doi.org/10.1289/ehp.9540 |
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