Appendix 3
Movement and Learning Patterns of the Unborn Child and The Development of the Senses

 

Yawning

 

Timing

Source
Has been observed.
9th week after conception de Vries (1985), p 116
First occurs. 9 1/2 - 13 1/2 weeks after conception Nijhuis/de Vries, p 5


 


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