THE UNIVERSITY OF MANITOBA STUDIES ON OVINE PLACINTAL ...

't73
fetal cotylêdons at various days of Eêstati;n
Table V shows the concentration of opl in the extracts of
naternaì, fetal cotyledons, and intercaruncular tissues between
l6 and 40 days of gestation. It ls apparent that opl concentrations in
extracts of fetal cótyl edbns ,were h.lgher than in extracts of
maternal caruncular ti s sues . Furthermore, it is also evident that
oPL was also present in the Íntercaruncular tissues.
Table VI shows that .ln the extracts of fetaì membranes
( chorion, allantois, and chorio-al lantolg), opl concent¡ation in
chorionic extracts were higher than ln the allantoic extracts before
20 days of gestation. In later gestational period, when the chor.ion
and allantois were fused to become chor io-ar r antoi c membrane, high
concentratÍ on of opL was found in these tissue extracts.
at Various
Figure 30 shows the opL concentrations in placentomes at
various stages of pregnancy. In extracts obtalned before day 40,
oPL ín fetar membranes was higher than in extracts of materna.l
caruncles. In placentomes, opl concentrafions reached peak leìrels
after day 100.
the