23h 42min, aug 8, 2002 y - by week 5 The neural tube will develop into your baby's brain, spinal cord, and nerves. The amniotic sac now houses the embryo, which floats in sea of fluid.
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https://www.babycenter.com/6_your-pregnancy-5-weeks_1094.bcAdded to timeline:
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23h 42min, aug 8, 2002 y
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~ 23 years ago