Appendix 2
The Development of the Unborn Child's Body

 

Fingers

 

Timing

Source
The primordia of the fingers, called digital rays, start to develop.
6th wek after fertilization Moore, p 94
Finger rays are visible. Day 38 of development Larsen, p 209
Finger rays are developing. Day 38 after fertilization Sadler, front pages
The rudiments of the fingers become evident. Day 42 after conception Rugh, p 47
The fingers are developing. Day 43 after fertilization Sadler, front pages
Thumbs and fingers with pads are present. 7th week after conception Rugh, p 44
All the fingers are present. 7th week after conception Rugh, p 52
The fingers are separated. About day 52 after fertilization Moore, p 100
The fingers are free. Days 50-56 Sadler, p 110
The fingers are free and longer. Days 52-53 after fertilization Moore, p 91
The fingers of both hands are usually found close to the nose. Day 56 after conception Rugh, p 53
Local stimuli may induce partial closing of the fingers. 8th week after fertilization Williams, p 169
The fingers are differentiated. End of 10th week after fertilization Williams, p 154


 


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