Appendix 1
The Chronological Development of The Unborn Child

 

Tenth Week

 

Timing

Source
The eyelids are closed.
10th week after fertilization Moore, p 238
The intestines are developing in the abdomen. 10th week after fertiliztaion Moore, p 109; Williams, p 155
The fingernails are present. 10th week after fertilization England, p 173
Stretching an arm is frequently accompanied by extending the fingers. From 10th week after conception de Vries (1982), p 307
Finger movements first occur. 10th week after conception Nijhuis/de Vries, p 5
Opening and closing one or more fingers can be seen. 10th week after conception Nijhuis/de Vries, p 6
Hand-to-face contacts were observed in 12 of 12 fetuses studied with a median frequency of about 25 contact per hour. 10th week after conception de Vries (1985), p 113
Jaw openings were observed in 10 of 12 fetuses studied with a median rate of about 18 per hour. 10th week after conception de Vries (1985), p 114
The most common movement patterns have emerged. 10th week after conception de Vries (1988), p 87

Fingernails begin to develop at the end of the digits.

About 10th week after fertilization Moore, p 519
Fingernail anlagen first appear. About 10th week Larsen, p 311
The tooth buds for permanent teeth begin to appear. About 10th week after fertilization Moore, p 523
Toenails begin to develop at the tips of the digits. About 10th week after fertilization Moore, p 519
Sucking first occurs. 10 1/2 - 12 1/2 weeks after conception Nijhuis/de Vries, p 5
Swallowing first occurs. 10 1/2 - 12 1/2 weeks after conception Nijhuis/de Vries, p 5
Fingernails are present. End of 10th week after fertilization Williams, p 154
The fingers are differentiated. End of 10th week after fertilization Williams, p 154
Scattered rudiments of hair appear. End of 10th week after fertilization Williams, p 154
External genitalia are starting to indicate whether the fetus will be male or female. End of 10th week after fertilization Williams p 154
The toes are differentiated.

End of 10th week after fertiliztaion

Williams, p 154
Toenails are forming. End of 10th week after fertilization Williams, p 154
The prostate and seminal vesicles develop in males. 10th - 13th weeks Larsen, p 175
The fetus responds to sound. 10th - 14th weeks after conception Nijhuis/Hepper, p 133
     


 


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