Pregnancy Videos & Photos - The First Month
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Brought to you by Nine Months To Birth The embryonic disk has become thicker and oval in shape, coiled up because the outermost layer, the ectoderm, has developed faster than the endoderm. One end of it has swollen to form the brain, and the other corresponds to the coccyx. Between the two, the neural groove will form the central nervous system. The branchial arches, the heart and the vitelline sac are located below the cephalic region. The vertebrae held together by connective tissue are visible. And of course the heart is beating. The entire structure has the shape of a comma and measures 5mm in length. |
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Pregnancy Video: Weeks 1-4 (First Month) |
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What's going on in your week of pregnancy?Don't know your due date? Of Special Interest to Expecting Parents
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