A theoretical and practical treatise on midwifery : including the diseases of pregnancy and parturition and the attentions required by the child from birth to the period of weaning . Fisr. 37. A. The layer of albumen, v. The vitelline membrane. according to the statement of Barry atid Bischoff, the yolk undergoes the mostremarkable changes of all, for, instead of form-ing, as hitherto, a compact, homogeneous mass,it is divided first into two rounded portions (), the number doubling successively, in pro-portion as the ovum approaches the womb—theirdiameter of course diminishing at the sam
A theoretical and practical treatise on midwifery : including the diseases of pregnancy and parturition and the attentions required by the child from birth to the period of weaning . Fisr. 37. A. The layer of albumen, v. The vitelline membrane. according to the statement of Barry atid Bischoff, the yolk undergoes the mostremarkable changes of all, for, instead of form-ing, as hitherto, a compact, homogeneous mass,it is divided first into two rounded portions (), the number doubling successively, in pro-portion as the ovum approaches the womb—theirdiameter of course diminishing at the same time ;consequently, in tracing the vitellus along theduct, the whole yolk will be observed to dividein two regular rounded halves, then into four(Fig. 36), afterwards into eight little spheres,and finally, each of the last subdivides again;so that, by reason of these successive subdivi-sions, the vitelline spheres become smaller andsmaller, and ultimately terminate by causing thewhole mass of the yolk to resemble a mulberryin appearance. The yolk is in course of disso-lution at the period when the ovum arrives inthe womb. The time necessary for the ovum to traverse this p
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Keywords: ., boo, bookcentury1800, booksubjectmidwifery, booksubjectobstetrics
