Appendix 2
The Development of the Unborn Child's Body

 

Mouth

 

Timing

Source
The mouth opens for the first time.
Day 28 after conception Rugh, p 42
The primitive mouth is forming. Day 31 after fertilization Moore, p 5
The oral and nasal cavities are confluent. Day 36 after fertilization Moore, p 5
The oral cavity is developing. 6th week Sadler, p 376
The mouth is present. About day 56 after fertilization Moore, p 100
Opening the mouth may be induced by local stimuli. 8th week after fertilization Williams, p 169


 


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