Archive image from page 639 of The cyclopædia of anatomy and. The cyclopædia of anatomy and physiology cyclopdiaofana05todd Year: 1859 564 UTERUS AND ITS APPENDAGES. which produced it closes in the same manner as when conception has not occurred, but it does not shrink rapidly, as in the latter case. On the contrary, the inner coat or original ovi- sac continues to increase in thickness, in conse- quence of a still larger deposit of yellow oil granules in its substance. The outer coat of the follicle or tunic of the ovisac suffers no change ; but upon the interior of the ovisac, and therefore
Archive image from page 639 of The cyclopædia of anatomy and. The cyclopædia of anatomy and physiology cyclopdiaofana05todd Year: 1859 564 UTERUS AND ITS APPENDAGES. which produced it closes in the same manner as when conception has not occurred, but it does not shrink rapidly, as in the latter case. On the contrary, the inner coat or original ovi- sac continues to increase in thickness, in conse- quence of a still larger deposit of yellow oil granules in its substance. The outer coat of the follicle or tunic of the ovisac suffers no change ; but upon the interior of the ovisac, and therefore lining the cavity, is formed a membrane, the origin and nature of which will be presently considered ; or else it may happen that the cavity becomes obliterated by the organisation of the clot by which it had been at first filled. After conception it is probable that the ac- tual diameter of the follicle does not at any time materially increase. So great, however, are the variations in its size in different sub- jects, that this point scarcely admits of being accurately determined. The Graafian follicle may, at the time of rupture, occupy \, £, or i of the entire ovary. These at least are the dimensions which it is usually found to have, in different instances, during the first four months of pregnancy ; but after this period the process of diminution begins to be percep- tible. All the changes which are now observ- able in regard to form, solidity, and other par- ticulars obvious to the unaided senses, and all the histological changes are to be looked for within the outer coat of the follicle. The latter appears to suffer no alteration, but simply to follow the movements of its contained parts, around which it remains loosely applied. The ovisac, however, or inner coat, rapidly in- creases in thickness, in consequence of a more considerable accumulation in its texture of the same yellow oil whose deposition had be- gun in it long before the follicle had ruptured, and when
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