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Encyclopediabirthbirth or labor,delivery of the fetus by the viviparous mammal. Birth is also known as parturition. Human birth normally occurs about 280 days after onset of the last menstrual period before conception. Sections in this article: The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2007, Columbia University Press. All rights reserved. More on birth from Infoplease:
- Births - The following index lists birth statistics for the United States, including number of births, live births, birth rates, multiple births, contraceptive use, annual expenditures, and more.
- Birth Statistics for Unmarried and Married Women - The following table shows the number of births, the birth rate, and the percent of births to unmarried women aged 15 to 44 years between 1980 and 2006 in the United States.
- Mothers by the Numbers - Info about mothers from the Census Bureau
- Births by Age and Race of Mother - The following table shows the number of live births to Black, White, Hispanic, American Indian, and Asian women age 15 to 49 between 1940 and 2005.
- Births and Birth Rates - The following table lists the number of live births and the birth rate in the United States between 1910 and 2005.
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