You are 4 Weeks and 2 Days Pregnant

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4 Weeks 2 Days Pregnant

250 days to go...

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human embryo developing its third layer

Your baby today

The embryo until this stage of development has consisted of two layers of cells. Now, a third layer starts to become visible as a "bulge" between the two-this bulge can be seen in the center of this image.
In this third week since conception, the cells that will become the embryo move to form the basis of the central nervous system.
pregnancy day by day information book cover

Pregnancy Day by Day

By Consultant Editor, Paula Amato, MD

Original source: Pregnancy Day by Day.

Copyright © 2008 Dorling Kindersley Limited.

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