. American journal of obstetrics and gynecology. strengthen the walls. Thiswould certainly be in accord with the theory of Fuchs and Jores. Butwe also find that in many which have to i-educe their lumen butslightly, this is brought about in a manner that is similar in everydetail to that of building a hyperplastic layer. Now in such a case the l(i(i THi: AMKRICAX .lorRXAL OF OBSTETRICS AND GYXIXOLOGY f-ausc of this new growth is certainly not an increase in blood pressure,but is a condition analogous in almost every circumstance with that ofthe intrafetal umbilical vessels. In such a
. American journal of obstetrics and gynecology. strengthen the walls. Thiswould certainly be in accord with the theory of Fuchs and Jores. Butwe also find that in many which have to i-educe their lumen butslightly, this is brought about in a manner that is similar in everydetail to that of building a hyperplastic layer. Now in such a case the l(i(i THi: AMKRICAX .lorRXAL OF OBSTETRICS AND GYXIXOLOGY f-ausc of this new growth is certainly not an increase in blood pressure,but is a condition analogous in almost every circumstance with that ofthe intrafetal umbilical vessels. In such a uterus the building of thehyperplastic layer is an endeavor on the inut of the artery to reduceits caliber to the demands made upon it. just as Thoma found in thevessels of the n(wl)orn. Work certainly seems to prove that bothJores and Thoma are right in their theories, and that lowered bloodpressure and .slowing of the blood stream on the one hand, as well ashigh blood pressure and increased work on the other, can call forth thesame Fig. 13.—Ob. Path. No. 3149. Haematoxylin-Eosin Stain. Sliowing small arterywith marked localized thickening of intima. Xo fatty changes or wandering cell.« present. Witliiiiil going intii any greater deVail ((niceniiiig tlicsc changes wewill briclly (lescribe the charact(>r of the material wliii-h was availa!>lefor our .study and the method in wliicli it was studied. We may say thatwe were primarily interested in trying to discover changes analogousto the changes which Goodall described as postinirtum changes. Ourattention was soon attracted to the frequent thickening of the intima invarious locations, .so we also investigated these lesions. There were inall 24 uteri, 4 of which were from early pregnancies between 14 and 19weeks; two between 24 and 8(5 weeks; 12 between 86 and 40 weeks, and.) in the early puer|ieiiuni. and one five months i)osti);irt iini. We shall SCHWARZ AXD MC : TTERINE VESSELS DT^RIXG PREGNANCY Hi I
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