Better to throw it away than to create a potential market for embryonic tissue the way people today buy and sell female eggs.
22.
Some antiabortion advocates fear the medical work gives a tacit sancion to abortion, since discarded embryonic tissue from abortions could be used in the studies.
23.
Researchers hypothesized a link between the slight preference for inactivation of the paternal X in mice tissue, and the preference in extra-embryonic tissue and Marsupials.
24.
The embryo will then develop normally; the fetus is exclusively derived from the ES cell, while the extra-embryonic tissues are exclusively derived from the tetraploid cells.
25.
In mammals ( except monotremes ), the ICM will ultimately form the " embryo proper ", while the trophectoderm will form the placenta and extra-embryonic tissues.
26.
Unless it receives other signals, the embryonic tissue that gives rise to the external genitalia will form itself into normal female structures during the first trimester.
27.
But anti-abortion advocates, along with some religious and ethics opponents, raised a furor over federal support for something that turned embryonic tissue into a medical commodity.
28.
The great weight of scientific opinion, however, says adult stem cell studies are not a substitute for properly conducted research into the uses of embryonic tissue.
29.
The program lets users manipulate colorful three-dimensional reconstructions of the embryos, zoom in and out of the embryonic tissue, and find specific parts of the embryos.
30.
The brain type is predominant in adult brain and embryonic tissues, whereas the liver and muscle types are predominant in adult liver and skeletal muscle, respectively.
