http://www.ehd.org

The Endowment for Human Development - Improving lifelong health, one pregnancy a...
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Explore pregnancy and prenatal development with EHD's free, onweb educational resources featuring direct videography and 4D ultrasound of the living embryo and fetus. Learn how humans develop from a single cell into a 100-trillion cell adult. Educators can access extensive, password protected curricular content.middle late pregnancy? infancy? Answer: All of the above! Find out why | Give babies a healthy futu...
[教育、培訓] - www.*hd.org - UTF-8 - 2010-09-01

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