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


Head Rotations



First occur.
7 1/2 - 10 1/2 weeks after conception Nijhuis/de Vries, p 5
Observed in 12 of 12 fetuses, studied with a median rate of about 5 head rotations per hour. 11th week after conception de Vries (1985), p 113
In a study of 9 fetuses, the median number of head rotations was 63 per hour. 18th week after conception Roodenburg, p 33


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