|
Hand-to-Face Contacts
|
Timing
|
Source |
Insertion of the fingers into the
mouth has been observed.
|
8th week after conception |
Nijhuis/de Vries, p7 |
| First occur. |
8-10 1/2 weeks after conception |
Nijhuis/de Vries, p 5 |
| The hand touches the face slowly and
the fingers often open and close. |
8-10 1/2 weeks after conception |
de Vries (1982), p 309 & p 311 |
| Observed in 12 of 12 fetuses studied,
with a median frequency of about 25 contacts per
hour. |
10th week after conception |
de Vries (1985), p 113 |
| In a study of 9 fetuses, the median
number of hand-to-face contacts was 95 per hour. |
18th week after conception |
Roodenburg, p 33 |
