3-4 week: internal ear forms

4 week: 4 pair of branchial arches, 5^th and 6^th arches cannot be seen on surface

4-5week: primitive face begins to emerge (two nasal placodes and sink to form nasal pits)

5-6 week: tissue that forms soft palate begins to migrate

5^-8 week: MaxP increases in size and grows medially to the LNP forming the upper lip and outer portion of nares

7-9 week: closure of the upper lip

8 week: hard and soft palate share space; hard palate divides the oral and nasal cavities, soft palate is a continuation of the pharynx

9-10 week: complete closure of the hard palate

10 week: heart moves internally and the tongue descends and uvula 10-12 week: the soft palate tissue fuses

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