Appendix 2
The Development of the Unborn Child's Body

 

Muscle

 

Timing

Source
Building blocks are present for 40 pairs of muscles, which are located from the base of the skull to the bottom of the spinal column.
Day 28 after conception Rugh, p 35
Muscles appear in the pelvic region. Day 31 after conception Rugh, p 43
All of the muscle blocks have appeared. Dy 36 after conception Rugh, p 46
Muscular layers of the stomach, esophagus, and intestines begin to proliferate. Day 56 after conception Rugh, p 53
The first indication of limb musculature is observed. 7th week of development Sadler, 7th edition, p 168


 


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