A human embryo or fertilized ovum in the first fourteen days after fertilization, before implantation in the uterus has occurred.
Oraciones de ejemplo
- The embryos, or pre-embryos, at fertility clinics are frozen at sometime between two and five days after fertilization.
- Before fourteen days, the embryo, or pre-embryo as it was scientifically known, was a loose cluster of first two, then four, then sixteen cells, undifferentiated.
- Implantation of the pre-embryo in the uterine wall is a highly invasive process, akin to attack by a parasite.
- Oraciones de ejemplo
- Therapeutic cloning, on the other hand, is a technique in which pre-embryonic tissue cloned from human donors who are suffering from a variety of diseases like Parkinson's, Alzheimer's and diabetes would be used to produce stem cells.
Definición de pre-embryo en:
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