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





First occur.
6th week after conception Roodenburg, p 32
First occur. 6 1/2 - 8 1/2 weeks after conception Nijhuis/de Vries, p 5
Observed in 12 of 12 fetuses studied, with a median frequency of about 50 hiccups per hour. 8th week after conception de Vries (1985) p 108
The frequency of hiccupping changes during the day. In a study of 10 fetuses, the median number of hiccups during 8 AM to 10 AM was 28 per hour, decreasing to 12 per hour during 1 PM to 3 PM. 20th - 22nd weeks after conception de Vries (1987), p 338


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