Appendix 3
Movement and Learning Patterns of the Unborn Child and
The Development of the Senses
Head Rotations
|
Timing
|
Source |
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 |
|