Universlty of Manitoba, ln Partîal Fulfiìlment - MSpace at the ...

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Comparison of Figs. 12, lJ and 14 shows thät obliteration of the
introduced air space reduces its teratogenic effect, part¡cularly when
performed immediately after windowíng. comparlson of the statisticêl
analyses, however, shows some incons¡stencies between the three
expe r¡ ments 3
(") early deaths and deveroping embryos in the combined experimental
groups and the control group:
albumen ¡ n troduct ¡on
F12 înt roduct i on
air cell reexpanslon
N.S.
N.S.
P < 0.01
(b) early deêths and developing embryos in each experimental group:
albumen introduction
F12 i nt roduct i on
aír cell reexpansion
N.S.
N.S.
P < 0.01
(") deaths and defects in developíng embryos of each developing group
of experimental emb ryos
albumen ¡ntroduction
F12 introduction
air cel.l reexpansion
P < 0.01
N.S.
0bl iteration of the introduced air space thus reduces the early
deãth rates within and between the experímental groups when albumen or
F12 (but not air cell reexpansion) are emproyed. A more subtre reduction
ln later deaths and malformatíons is achieved by air cerr reexpansion
(but not by albumen or Fl2), Despite these difference the experiments
confirm that the presencè of an artìf ical. air space above.
chick embryos at early developmental stages is hlghly teratogenic.