This article presents the results of a study that investigates the way in which carriers of a mutation on the BRCA1 or the BRCA2 gene, associated with a high risk of breast and ovarian cancer, make their reproductive decisions. Using semi-structured interviews, the study explored the way in which these persons reflected on the acceptability of taking the risk of transmitting this mutation to the next generation, the arguments they used in favor or against taking that risk, and in the light of these arguments, their opinion on the acceptability of preimplantation genetic diagnosis (PGD) as a reproductive option. The findings suggest that when carriers are planning to have a(nother) child, they are mainly concerned by the risk of transmitting 'much more than a gene': essentially painful experiences not only with respect to health, such as undergoing cancer surveillance or combatting one's own illness, but also with regards to family life, such as witnessing the illness and death of a close relative, encountering difficulties in finding a partner or reconsidering one's plans to have a family. As for opinions concerning the acceptability of PGD as a reproductive option, opinions about personal recourse were varied but all expressed the understanding that PGD should be made available to those persons who consider it their best option.

The French medical context is characterized by institutionalization of the ethical reflection in health care facilities and an important disparity between spaces of ethical reflection. In theory, the healthcare professional may mobilise an arsenal of resources to help him in his ethical reflection. But what happens in practice? We conducted semi-structured interviews with 22 health-care professionals who did and did not have recourse to clinical ethical committees. We also implemented two focus groups with 18 professionals involved in various spaces of ethical reflection in order to let them debate about a better way to organize ethical reflection in their institutional contexts. The qualitative analysis allows to us to underline the coexistence of different conceptions of ethics among health care professionals. We also observed that the participants in our study shared the experience of ethically problematic situations as roadblocks in the process of communication and decision-making. We therefore report the factors which favour or inhibit the ethical course leading to the resolution or at the very least soothing of the situation at hand. Finally, we discuss methodological issues and underline the fact that while the patient is at the heart of the professional's ethical preoccupations, this does not imply that they are actors in decisions that concern them.

The human intestinal ecosystem, previously called the gut microflora is now known as the Human Gut Microbiota (HGM). Microbiome research has emphasized the potential role of this ecosystem in human homeostasis, offering unexpected opportunities in therapeutics, far beyond digestive diseases. It has also highlighted ethical, social and commercial concerns related to the gut microbiota. As diet factors are accepted to be the major regulator of the gut microbiota, the modulation of its composition, either by antibiotics or by food intake, should be regarded as a fascinating tool for improving the human health. Scientists, the food industry, consumers and policymakers alike are involved in this new field of nutrition. Defining how knowledge about the HGM is being translated into public perception has never been addressed before. This raises the question of metaphors associated with the HGM, and how they could be used to improve public understanding, and to influence individual decision-making on healthcare policy. This article suggests that a meeting of stakeholders from the social sciences, basic research and the food industry, taking an epistemological approach to the HGM, is needed to foster close, innovative partnerships that will help shape public perception and enable novel behavioural interventions that would benefit public health.

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