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16 weeks
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20 weeks
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24 weeks
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28 weeks
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32 weeks
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36 weeks
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40 weeks
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week four
The primitive placenta is also made up of two layers at this point. Its cells are tunneling into the lining of your uterus, creating spaces for your blood to flow so that the developed placenta will be able to provide nutrients and oxygen to your growing baby when it starts to function at the end of this week. -
week eight
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week twelve
