Appendix 1
The Chronological Development of The Unborn Child

 

Ninth Week

 

Timing

Source
Hair folicles first appear on the eyebrows, eyelids, upper lip, and chin.
End of 2nd month Larsen, p 309
The legs are short and the thighs are relatively small. Beginning of the 9th week after fertilization Moore, p 111
Breathing movements have been detected. 9th week after fertilization Boddy, p 4
Breathing movements were observed in 10 of 12 fetuses studied, with a median frequency of about 30 movements per hour. 9th week after conception de Vries (1985) p 106
The eyes are closing or closed 9th week after fertilization Moore, p 109; Williams, p 155
The small intestine undergoes peristalsis. 9th week after fertilization Williams, p 169
The upper and lower lips are forming. 9th week Sadler, p 376
Red blood cells are formed primarily in the liver. 9th week after fertilization Moore, p 112
The face is broad, the eyes are widely separated, the ears are low-set, and the eyelids are fused. 9th week after fertilization Moore, p 110
The anus is present. 9th week after fertilization England, p 146
The buttocks are present. 9th week after fertilization England, p 146
Tongue movements first occur. 9th week after conception Nijhuis/deVries, p 5
Yawning has been observed. 9th week after conception de Vries (1985), p 116
Hair begins to develop. 9th - 12th weeks after fertilization Moore, p 517
Yawning first occurs. 9 1/2 - 13 1/2 weeks after conception Nijhuis/de Vries, p 5
     


 


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