Movie TheaterHuman Development |
| Buy NowFrom The Biology of Prenatal Development. |
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Script: Biologiese gesproke, "begin menslike ontwikkeling met bevrugting", wanneer 23 van die man se chromosome, en 23 van die vrou s'n, tydens die vereniging van hul voortplantingselle bymekaar gevoeg word. |
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All ages referenced to fertilization, not last menstrual period.
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