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The Endowment for Human Development
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Roof of the Mouth

3 months

From The Biology of Prenatal Development.Buy Now

Note:

By about 11 weeks, the two sides of the roof of the mouth fuse together along the midline and also fuse with the nasal septum above.

Label Key:

1. right upper lip
2. tongue
3. roof of mouth (hard palate)
4. line of fusion along the midline of the palate
All ages referenced to fertilization, not last menstrual period. One month = 4 weeks.
Three-Month Fetus
Three-Month Fetus
Fingertips of Right Hand
Fingertips of Right Hand
Roof of the Mouth
Roof of the Mouth
Meconium Release
Meconium Release
Right Hand Covering Face
Right Hand Covering Face
Partially-Closed Left Hand
Partially-Closed Left Hand


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