单词	preimplantation
释义	preimplantation /ˌprēimˌplanˈtāSH(ə)n / adjective Zoology & Medicine Occurring or existing between the fertilization of an ovum and its implantation in the wall of the uterus.As a result of these provisions, it can be said that English law divides human pregnancy into three stages for the purposes of abortion law: pre-implantation, between implantation and twenty-four weeks, and after twenty-four weeks.... The guidelines state that pre-implantation genetic diagnosis for anything will be considered on a case-by-case basis. The technique pioneered by the team could be used for pre-implantation genetic diagnosis.
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