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fetal stage |
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fetal stage, (in embryology) the interval from the end of the embryonic stage, at the end of the seventh or eighth week of gestation, to birth, 38 to 42 weeks after the first day of the last menstrual period. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| We are supplemented with omega-3 acids during the fetal stage across the placenta and, upon birth, through human milk. Once again, usable cells were produced only after the researchers placed the cloned mouse embryos in "surrogate mother" mice, grew them to the late fetal stage (the equivalent of the fifth to sixth month of pregnancy in humans), then aborted them for their heart tissue. For example, chapter 1, "Growth and Development," contains 14 tables that provide easy-to-read descriptions of typical and atypical motor development from the fetal stage to approximately 5 years of age. |
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