EMBRYO OF THREE MONTHS. 



153 



Embryos of the eleventh and twelfth weeks are very rarely obtained. I have 

 never had a normal one of this period with data to determine the age. 



Three Months. Embryos of 78 to 80 mm. In my experience there is no 

 other age at which abortion of normal embryos occurs so frequently as at three 

 months, and I possess a number of specimens of this age, which agree very 

 closely with one another in size and form. The foetus drawn in figure 94 may be 

 taken to represent accurately the appearance of the human embryo at three 

 months. The position of the limbs is typical for this age, but there are slight 



variations, in that the hands, one or 

 both, may project more and be higher 

 or lower; usually the right foot lies in 

 front of the left, but not always. 

 Figure 95 gives the front view of face 

 of the same embryo to show the closed 

 eyelids, the broad triangular nose, the 

 thick lips, and the pointed chin. 



Three and One-half Months. 

 Embryos of 108 to no mm. I have 

 several specimens which represent 



FIG. 94. HUMAN EMBRYO OF 78 MM. THREE 

 MONTHS. 



FIG. 95. FRONT VIEW OF THE FACE OF THE 

 EMBRYO SHOWN IN FIG. 94. 



this age. I figure two of them, one to show the natural attitude (Fig. 96) in 

 utero,ihe other to show the natural attitude assumed by the embryo when 

 released from its membranes. The first specimen came to me with no history, 

 but as it is certainly a little larger than several other foetuses of about one 

 hundred and six days, it is probably a little older. The head is bent forward 

 (Fig. 96) ; the back is curved ; the arms and legs are both raised toward the 

 face; the right leg is nearly straight, so that the toes are brought against 

 the forehead, while the left leg is bent at the knee, bringing the left foot 



