NUTRITION OF THE EMBRYO. 21 



acuteness in him to discover such suffering when it exists, 

 nor very much real affection to control himself accordingly. 

 In the class of cases referred to, rest of the over-irritable 

 and congested female organs is above all essential. The 

 cause is frequently removable by simple, but skilled, treat- 

 ment; the desirability of rendering this available to a 

 woman in members of her own sex has already been insisted 

 upon. 



Even when no pain is caused harm may be done: the presi- 

 dent of the Gynaecological Society, in an address delivered 

 before that body, lately stated that if either party to a coi- 

 tion fails of the orgasm damage is apt to ensue, but espe- 

 cially to the woman if she fail; the organs are congested from 

 the stimulus of the sexual act and the normal final orgasm 

 is required for their healthy relief and return to the resting 

 condition. If this be so, it is 

 clear that coition should be 

 restricted to times when the 

 woman's general state encour- 

 .ages the orgasm, and unless 

 she generally experiences it 

 sexual congress should be 

 avoided until her health is 

 restored. 



The Foetal Appendages. In 

 the earliest stages of life, those 

 occurring in the davs imme- 



J FIG. 165. The embryonal vesicle. 



diatelv after fertilization of the a > thinned and distended zona pel- 



lucida; this soon after disappears 



OVlim, there IS little Or no altogether; &, the blastoderm; c, 

 / n w mi tne embryonal disk. 



\J_growth. # The ovum segments 



* into a number of cells, but the morula thus formed is little 

 larger than the original egg-cell itself. At first it is a solid 

 mass (F, Fig. 8, p. 26), but its cells soon recede from the 

 centre and become arranged (Fig. 165) around a central 

 cavity containing mainly some absorbed liquid; at one point, 

 c (the embryonal dis&), the layer thickens, and from thence 

 the thickening spreads, by cell growth and multiplication, 

 over the whole sac, which is known as the embryonal 

 vesicle; the membrane thus formed is the blastoderm, and 



