Genetics and Reproduction

遗传学与生殖
  • 文章类型: Journal Article
    The US National Academy of Sciences (NAS) recently published voluntary guidelines for human embryonic stem (hES) cell research. The NAS guidelines propose two levels of oversight. AT the local level, research institutions are to create Embryonic Stem Cell Research Oversight (ESCRO) committees with a mandate to assess the scientific merit and ethical acceptability of hES cell research. At the national level, a new committee is to be created, not to review specific research proposals, but rather to periodically assess, and as needed revise, the NAS guidelines. In this article, we critically assess this proposal. In particular, we review the benefits and limitations of local research review. On this basis, we argue that local review is insufficient for hES cell research and that while there are obvious pragmatic and political reasons for the NAS to favor local research review, there are more compelling reasons for the NAS to have recommended national review of hES cell research proposals.
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    文章类型: Newspaper Article
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  • 文章类型: Journal Article
    An objection often is raised against the use of reproductive technology to create \"nontraditional families,\" as in ovum donation for postmenopausal women or postmortem artificial insemination. The objection states that conceiving children in such circumstances is harmful to them because of adverse features of these nontraditional families. A similar objection is raised when parents, through negligence or willful disregard of risks, create children with serious genetic diseases or other developmental handicaps. It is claimed that such reproduction harms the children who are created. In reply to this Harm to the Child Argument, it has been pointed out that the procreative acts that supposedly harm the child are the very acts that create the child. This reply has been developed into an argument that, in most of the types of cases under consideration, creating the child does not harm her. This reply, the No Harm Argument, has been stated in three main ways, and it is one of the most misunderstood arguments in bioethics. This paper examines the main rebuttals that have been made to the No Harm Argument and argues that none of them is successful.
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  • 文章类型: Journal Article
    BACKGROUND: Proposed federal legislation would require physicians to inform women seeking abortions at 20 or more weeks after fertilization that the fetus feels pain and to offer anesthesia administered directly to the fetus. This article examines whether a fetus feels pain and if so, whether safe and effective techniques exist for providing direct fetal anesthesia or analgesia in the context of therapeutic procedures or abortion.
    METHODS: Systematic search of PubMed for English-language articles focusing on human studies related to fetal pain, anesthesia, and analgesia. Included articles studied fetuses of less than 30 weeks\' gestational age or specifically addressed fetal pain perception or nociception. Articles were reviewed for additional references. The search was performed without date limitations and was current as of June 6, 2005.
    RESULTS: Pain perception requires conscious recognition or awareness of a noxious stimulus. Neither withdrawal reflexes nor hormonal stress responses to invasive procedures prove the existence of fetal pain, because they can be elicited by nonpainful stimuli and occur without conscious cortical processing. Fetal awareness of noxious stimuli requires functional thalamocortical connections. Thalamocortical fibers begin appearing between 23 to 30 weeks\' gestational age, while electroencephalography suggests the capacity for functional pain perception in preterm neonates probably does not exist before 29 or 30 weeks. For fetal surgery, women may receive general anesthesia and/or analgesics intended for placental transfer, and parenteral opioids may be administered to the fetus under direct or sonographic visualization. In these circumstances, administration of anesthesia and analgesia serves purposes unrelated to reduction of fetal pain, including inhibition of fetal movement, prevention of fetal hormonal stress responses, and induction of uterine atony.
    CONCLUSIONS: Evidence regarding the capacity for fetal pain is limited but indicates that fetal perception of pain is unlikely before the third trimester. Little or no evidence addresses the effectiveness of direct fetal anesthetic or analgesic techniques. Similarly, limited or no data exist on the safety of such techniques for pregnant women in the context of abortion. Anesthetic techniques currently used during fetal surgery are not directly applicable to abortion procedures.
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  • 文章类型: Journal Article
    This article reviews the literature on prenatal screening for Down\'s syndrome. To be evidence based, medicine and nursing have to take account of research evidence and also of how this evidence is processed through the influence of prevailing social and moral attitudes. This review of the extensive literature examines how appropriate widely-held understandings of Down\'s syndrome are, and asks whether or not practitioners and prospective parents have access to the full range of moral arguments and social evidence on the matter. Highly valued ideals of justice, personal autonomy, parental choice, women\'s control over their reproduction and of avoiding harm can all tend towards negative rather than neutral approaches to Down\'s syndrome. This article considers how ethics and prenatal screening policies and practice that take greater account of social evidence of disability could use moral arguments that inform rather than determine the choices of people who use prenatal services.
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    文章类型: Newspaper Article
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  • 文章类型: Journal Article
    The objective of this study was to conduct a broad-based systematic review of social, ethical, and legal considerations associated with genetic cancer risk assessment technologies (CaRATs). This paper focuses on psychosocial and ethical issues. Search results were limited to papers published in English, French, or German from January, 1990, to May, 2003. A quality assessment tool was developed and applied to retrieved papers. Application of the quality assessment tool resulted in 77 of 247 qualitative and quantitative primary research papers being reviewed and synthesized. A broad range of issues were addressed and grouped into content areas. Despite a large literature addressing psychosocial and ethical issues associated with CaRATs, many existing studies are not adequate to inform decision-makers and stakeholders. Careful policy analysis, as in some of the economic analyses reviewed here, is important to bridge this gap.
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