In a 2008 case, however, the Supreme Federal Court ruled, by a 6-5 vote, that the right to life applies only to intrauterine embryos, and that frozen embryos not eligible to a uterus transfer do not hold fundamental rights and may be manipulated for research purposes.
In Yukinobu Hoshino's 2001 Nights manga, Night 4 showcases an interstellar mission where an automated ship bearing frozen embryos is launched with the help of a comet.
Hadley from Baswich, Staffordshire, underwent IVF treatment but later got divorced from her husband Wayne, and wanted to use two of her stored embryos to try to get pregnant.
Biologist PZ Myers responded to the institute's "bogus complaint that Olson was lying in the movie" about Ernst Haeckel's drawings of embryos is false.
Embryo splitting can be used for twinning to increase the number of available embryos.
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For instance, in 2008, a California physician transferred 12 embryos to a woman who gave birth to octuplets (see Suleman octuplets).
Male embryos (in the case of cytoplasmic inherited bacteria) or male larvae (in the case of Microsporidia) are killed.
Malebranche also developed an original theory related to preformationism, postulating that each embryo probably contained even smaller embryos ad infinitum, like a Matryoshka doll.
Recapitulation theory, a scientific theory influential on but no longer accepted in its original form by both evolutionary and developmental biology, namely, that the congruence in form between the same embryonic developmental stages of different species is evidence that the embryos are repeating the evolutionary stages of their ancestral history
The dorsal/ventral axis is defined in chick embryos by the orientation of the cells with respect to the yolk.
Through studies of human embryos performed in the late 1890s, Swiss anatomist Wilhelm His identified a portion of hindbrain neuroepithelium that was distinct from the rest of the hindbrain neuroepithelium in its morphology, sustained chromosomal division into late stages of embryogenesis, and deployment of streams of neurons through the hindbrain periphery.
In 1995, the 'Orange County Register broke the story that Asch — then Chief of the University of California, Irvine's Center for Reproductive Health — and his two partners were misusing human embryos, and harvesting and transplanting human eggs without patient consent.