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Definitions
Blastocyst
A mammalian blastula in which some differentiation of cells has occurred.
Preimplantation Genetic Screening
Is a screening test used to determine if chromosomal disorders are present in embryos produced through in vitro fertilization (IVF).
Zygote
A diploid cell resulting from the fusion of two haploid gametes; a fertilized ovum; sperm plus the egg.
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