20 results on '"van den Akker, O."'
Search Results
2. A systematic review and meta-analysis of psychological predictors of successful assisted reproductive technologies
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Purewal, S., Chapman, S. C. E., and van den Akker, O. B. A.
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- 2017
- Full Text
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3. The Delft-FEWS flow forecasting system
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Werner, M., Schellekens, J., Gijsbers, P., van Dijk, M., van den Akker, O., and Heynert, K.
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- 2013
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4. Support for Open Science Practices in Emotion Science: A Survey Study
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Van den Akker O, Jelte M. Wicherts, Scherer Ld, and Sander L. Koole
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Open science ,Survey research ,Sociology ,Data science - Abstract
So-called “open science practices” seek to improve research transparency and methodological rigor. What do emotion researchers think about these practices? To address this question, we surveyed active emotion researchers (N= 144) in October 2019 about their attitudes toward several open science practices. Overall, the majority of emotion researchers had positive attitudes toward open science practices and expressed a willingness to engage in such practices. Emotion researchers on average believed that replicability would improve by publishing more negative findings, by requiring open data and materials, and by conducting studies with larger sample sizes. Direct replications, multi-lab studies, and preregistration were all seen as beneficial to the replicability of emotion research. Emotion researchers believed that more direct replications would be conducted if replication studies would receive increased funding, more citations, and easier publication in high impact journals. Emotion researchers believed that preregistration would be stimulated by providing researchers with more information about its benefits and more guidance on its effective application. Overall, these findings point to considerable momentum with regard to open science among emotion researchers. This momentum may be leveraged to achieve a more robust emotion science.
- Published
- 2020
5. The effect of working memory training on food intake and diabetes control in people with Type 2 diabetes: a double blind randomised controlled trial
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Whitelock, V., Nouwen, A., Houben, K., van den Akker, O., Rosenthal, M., Higgs, S., Section Eating Disorders and Obesity, and RS: FPN CPS II
- Published
- 2017
6. The Delft-FEWS flow forecasting system
- Author
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Werner, M. Schellekens, J. Gijsbers, P. van Dijk, M. van den Akker, O. Heynert, K.
- Subjects
forecasting systems ,Delft-FEWS system ,environmental modelling ,software - Abstract
Since its introduction in 2002/2003, the current generation of the Delft-FEWS operational forecasting platform has found application in over forty operational centres. In these it is used to link data and models in real time, producing forecasts on a daily basis. In some cases it forms a building block of a country-wide national forecasting system using distributed client-server technology. In other cases it is applied at a much smaller scale on a simple desktop workstation, providing forecasts for a single basin. The flexibility of the software in open integration of models and data has additionally appealed to the research community. This paper discusses the principles on which the Delft-FEWS system has been developed, as well as a brief background of the architecture of the system and concepts used for storing and handling data. One of the key features of the system is its flexibility in integrating (third-party) models and data, and the available approaches to linking models and accessing data are highlighted. A brief overview of different applications of the system is given to illustrate how the software is used to support differing objectives in the domain of real time environmental modelling.
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- 2013
7. Expectations and experiences of gamete donors and donor-conceived adults searching for genetic relatives using DNA linking through a voluntary register
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van den Akker, O. B. A., primary, Crawshaw, M. A., additional, Blyth, E. D., additional, and Frith, L. J., additional
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- 2014
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8. The contextual challenges of successfully becoming a parent - from inception to completion
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van den Akker, O and Redshaw, M
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- 2008
9. QUALITY AND SAFETY OF ART THERAPIES
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Caballero, P., primary, Alonso, J., additional, Cortes, S., additional, Caballero Campo, M., additional, Gago, M., additional, Nunez-Calonge, R., additional, Ricciarelli, E., additional, Gomez Palomares, J. L., additional, Bruna Catalan, I., additional, Hernandez, E. R., additional, Grzegorczyk-Martin, V., additional, Belaisch-Allart, J., additional, Mayenga, J. M., additional, Kulski, O., additional, Plachot, M., additional, Darby, H. C., additional, Florensa Bargallo, M., additional, Perals Vazquez, N., additional, Esbert Algam, M., additional, Belles Fernandez, M., additional, Ballesteros Boluda, A., additional, Calderon de Oya, G., additional, Alegre de Miquel, M., additional, Choudhary, M., additional, Ramineni, A., additional, Stewart, J., additional, Cabello, Y., additional, Fernandez-Shaw, S., additional, Mercader, A., additional, Herrer, R., additional, Arroyo, G., additional, Del Rio, F., additional, Carrera, M., additional, Fernandez Sanchez, M., additional, Sumimoto, T., additional, Kataoka, N., additional, Ogata, H., additional, Mizuta, S., additional, Tokura, Y., additional, Yamada, S., additional, Ogata, S., additional, Mizusawa, Y., additional, Matsumoto, Y., additional, Okamoto, E., additional, Kokeguchi, S., additional, Shiotani, M., additional, Nagai, Y., additional, Otsuki, J., additional, Maeda, K., additional, Momma, Y., additional, Takahashi, K., additional, Chuko, M., additional, Miwa, A., additional, Nagai, A., additional, Seggers, J., additional, Haadsma, M. L., additional, La Bastide-van Gemert, S., additional, Heineman, M. J., additional, Kok, J. H., additional, Middelburg, K. J., additional, Roseboom, T. J., additional, Schendelaar, P., additional, Van den Heuvel, E. R., additional, Hadders-Algra, M., additional, Jongbloed-Pereboom, M., additional, La Bastide-Van Gemert, S., additional, Heineman, K. R., additional, Bos, A. F., additional, Kondapalli, L. A., additional, Shaunik, A., additional, Molinaro, T. A., additional, Ratcliffe, S. J., additional, Barnhart, K. T., additional, Haadsma, M., additional, Keating, P., additional, Van Hoften, J. C., additional, Veenstra-Knol, H. E., additional, Cobben, J. M., additional, Pirkevi, C., additional, Atayurt, Z., additional, Yelke, H., additional, Kahraman, S., additional, Desmyttere, S., additional, Verpoest, W., additional, Haentjens, P., additional, Verheyen, G., additional, Liebaers, I., additional, Bonduelle, M., additional, Winter, C., additional, Van Acker, F., additional, De Schrijver, F., additional, Nekkebroeck, J., additional, Pariente-Khayat, A., additional, de Laubier, A., additional, Fehily, D., additional, Lemardeley, G., additional, Merlet, F., additional, Creusvaux, H., additional, Nakajo, Y., additional, Sakamoto, E., additional, Doshida, M., additional, Toya, M., additional, Nasu, I., additional, Kyono, K., additional, Schats, R., additional, Vergouw, C. G., additional, Kostelijk, E. H., additional, Doejaaren, E., additional, Hompes, P. G. A., additional, Lambalk, C. B., additional, Nakamura, Y., additional, Takisawa, T., additional, Shibuya, Y., additional, Sato, Y., additional, Sato, K., additional, Berard, A., additional, Chaabane, S., additional, Sheehy, O., additional, Blais, L., additional, Fraser, W., additional, Bissonnette, F., additional, Monnier, P., additional, Tan, S. L., additional, Trasler, J., additional, Subramaniam, A., additional, Chiappetta, R., additional, Mania, A., additional, Trew, G., additional, Lavery, S. A., additional, van den Akker, O., additional, Purewal, S., additional, Bunnell, C., additional, Lashen, H., additional, Terriou, P., additional, Giorgetti, C., additional, Porcu-Buisson, G., additional, Roger, V., additional, Chinchole, J. M., additional, Hamon, V., additional, Allemand-Sourieu, J., additional, Cravello, L., additional, Moreau, J., additional, Chabert-Orsini, V., additional, Belva, F., additional, Roelants, M., additional, De Schepper, J., additional, Devroey, P., additional, Painter, R. C., additional, Machin, L., additional, Fearon, K., additional, Morishima, K., additional, Fujimoto, A., additional, Oishi, H., additional, Hirata, T., additional, Harada, M., additional, Hasegawa, A., additional, Osuga, Y., additional, Yano, T., additional, Kozuma, S., additional, and Taketani, Y., additional
- Published
- 2012
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10. SELECTED ORAL COMMUNICATION SESSION, SESSION 20: PARENTING AFTER GAMETE DONATION, Monday 4 July 2011 15:15 - 16:30
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Purewal, S., primary, Crawshaw, M., additional, van den Akker, O. B. A., additional, Casey, P., additional, Jadva, V., additional, Readings, J., additional, Blake, L., additional, Golombok, S., additional, Freeman, T., additional, Brewaeys, A. M. A., additional, Brewaeys, M., additional, and de Reus, E., additional
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- 2011
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11. Expectations and experiences of gamete donors and donor-conceived adults searching for genetic relatives using DNA linking through a voluntary register.
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van den Akker, O. B. A., Crawshaw, M. A., Blyth, E. D., and Frith, L. J.
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GAMETES , *ORGAN donor registries , *CONCEPTION , *QUESTIONNAIRES , *RELATIVES - Abstract
STUDY QUESTION: What are the experiences of donor-conceived adults and donors who are searching for a genetic link through the use of a DNA-based voluntary register service? SUMMARY ANSWER: Donor-conceived adults and donors held positive beliefs about their search and although some concerns in relation to finding a genetically linked relative were reported, these were not a barrier to searching. WHAT IS KNOWN ALREADY: Research with donor-conceived people has consistently identified their interest in learning about-and in some cases making contact with-their donor and other genetic relatives. However, donor-conceived individuals or donors rarely have the opportunity to act on these desires. STUDY DESIGN, SIZE, AND DURATION: A questionnaire was administered for online completion using Bristol Online Surveys. The survey was live for 3 months and responses were collected anonymously. PARTICIPANTS/MATERIALS, SETTING, AND METHODS: The survey was completed by 65 donor-conceived adults, 21 sperm donors and 5 oocyte donors who had registered with a DNA-based voluntary contact register in the UK. The questionnaire included socio-demographic questions, questions specifically developed for the purposes of this study and the standardized Aspects of Identity Questionnaire (AIQ). MAIN RESULTS AND THE ROLE OF CHANCE: Motivations for searching for genetic relatives were varied, with the most common reasons being curiosity and passing on information. Overall, participants who were already linked and those awaiting a link were positive about being linked and valued access to a DNA-based register. Collective identity (reflecting self-defining feelings of continuity and uniqueness), as assessed by the AIQ, was significantly lower for donor-conceived adults when compared with the donor groups (P < 0.05), but not significantly different between linked/not linked or length of time since disclosure of donor conception (all Ps > 0.05) for donor-conceived adults. LIMITATIONS, REASONS FOR CAUTION: Participants were members of a UK DNA-based registry which is unique. It was therefore not possible to determine how representative participants were of those who did not register for the service, those in other countries or of those who do not seek information exchange or contact. WIDER IMPLICATIONS OF THE FINDINGS: This is the first survey exploring the experiences of donor-conceived adults and donors using a DNA-based voluntary register to seek information about and contact with genetic relatives and the first to measure aspects of identity using standardized measures. Findings provide valuable information about patterns of expectations and experiences of searching through DNA linking, identity and of having contact in the context of donor conception that will inform future research, practice and policy development. STUDY FUNDING/COMPETING INTERESTS: No funding was obtained for this study. The authors have no competing interests to declare except for M.C. who was national adviser to UKDL from 2003-2013. TRIAL REGISTRATION NUMBER: Not applicable. [ABSTRACT FROM AUTHOR]
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- 2015
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12. The importance of a genetic link in mothers commissioning a surrogate baby in the UK
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van den Akker, O., primary
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- 2000
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13. A study of the effect of message framing on oocyte donation.
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Purewal, S., Akker, O. B. A van den, and van den Akker, O B A
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OVUM ,ORGAN donation ,WOMEN ,FAMILIES & psychology ,ATTITUDE (Psychology) ,BEHAVIOR therapy ,COMPARATIVE studies ,INTENTION ,INTERNET ,RESEARCH methodology ,MEDICAL cooperation ,PERSUASION (Rhetoric) ,MATHEMATICAL models of psychology ,RESEARCH ,SOCIAL skills ,EVALUATION research ,OVUM donation ,PATIENT selection - Abstract
Background: The aims of this study were to examine the effect of gain- and loss-framed messages on British and South East Asian women's intentions towards oocyte donation and to examine whether the components of the theory of planned behaviour influenced the relationship between framing and intentions.Methods: A total of 406 women participated in this study (mean age = 22, SD = 2.9). There were 211 participants in the gain condition and 195 in the loss condition.Results: An analysis of covariance found a main effect for framing (F(1, 402) = 6.3; P < 0.01) after controlling for existing attitudes towards oocyte donation and pre-message intentions to donate. Specifically, participants in the gain-framed condition were significantly more likely to report higher post-message intentions to donate oocytes than participants in the loss condition. However, the framing effect was only observed with British populations and not with women from South East Asia. Further, structural equation modelling analyses revealed lower levels of 'perceived behavioural control' (beta = -0.420, P < 0.03) and positive attitudes towards 'the importance of genetic ties between parent and child' (beta = 0.70, P < 0.001) were direct predictors of post-message intentions in the gain (but not loss) frame condition.Conclusion: Findings obtained from this study indicate that oocyte donation campaigns should consider using gain-framed messages in recruitment appeals and message frames should be matched to the target populations' perceived level of behavioural control. [ABSTRACT FROM AUTHOR]- Published
- 2009
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14. Systematic review of oocyte donation: investigating attitudes, motivations and experiences.
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Purewal, S. and Van den Akker, O. B. A.
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OVUM , *OVUM donation , *GAMETES , *INFERTILITY , *REPRODUCTIVE technology - Abstract
Background: The social and psychological factors determining intentions to donate gametes are important for clinics, policy-makers and recruitment campaigns. The aims of this systematic review were therefore to integrate the research findings regarding the psychosocial determinants of oocyte donation and extrapolate women's experiences of donation. Methods: A bibliographic search of English language publications of four computerized databases was undertaken with no time restriction set for publications. Results: A total of 64 studies met the inclusion criteria and were included in the review. The research syntheses revealed there were distinct differences between patient and non-patient (known, commercial, volunteer and potential) donors on demographic characteristics, motives for donation, and issues relating to disclosure and attitudes towards the resultant offspring. Further, studies have found that a significant proportion of oocyte donors and women from the general population were prepared to donate their oocytes as identifiable donors. Studies which have examined the experiences of donors report positive experiences of oocyte donation. However, a number of methodological limitations relating to the oocyte donation research literature have been identified in this systematic review. Conclusion: Differences between donor groups on a range of factors highlight the need for tailored psychosocial evaluation and counselling. The review has demonstrated that it is not useful to generalize across donor groups on various factors relating to oocyte donation. [ABSTRACT FROM AUTHOR]
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- 2009
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15. Organizational selection and assessment of women entering a surrogacy agreement in the UK.
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van den Akker, OBA and van den Akker, O B
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In the UK, surrogacy procedures are unregulated and not monitored. Information concerning the selection and assessment of intended (the mother commissioning) and surrogate mothers (the mother carrying and delivering the baby) is therefore not generally available (BMA, 1996). It is important to determine what type of assessment is used, and how selection takes place within the organizations dealing with surrogate motherhood arrangements. The present survey enquired about the incidence, selection and assessment procedures of all registered surrogate and commissioning couples, and aimed to find out what advice and support is given. Eight organizations took part in the survey, six were clinics and two agencies dealing with surrogate arrangements. Two voluntary organizations/helplines were also surveyed, but their data are not relevant to the results presented here. An interview and questionnaire approach was used. Psychosocial assessment was minimally addressed by all organizations, and no fixed procedures for assessment and selection were employed. Despite this, few incidences of controversial cases were reported. Confidence in this practice could be increased in the future if both parties embarking on a surrogacy arrangement knew they were properly selected and assessed. A regulatory body could monitor consistent use of professional evidence-based criteria prior to arrangements. [ABSTRACT FROM PUBLISHER]
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- 1999
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16. Posttraumatic stress and posttraumatic stress disorder after termination of pregnancy and reproductive loss: a systematic review.
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Daugirdaitė V, van den Akker O, and Purewal S
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- Female, Fertilization in Vitro psychology, Humans, Infant, Newborn, Male, Observational Studies as Topic, Perinatal Death, Pregnancy, Treatment Failure, Abortion, Induced psychology, Abortion, Spontaneous psychology, Fetal Death, Stress Disorders, Post-Traumatic etiology, Stress, Psychological etiology
- Abstract
Objective: The aims of this systematic review were to integrate the research on posttraumatic stress (PTS) and posttraumatic stress disorder (PTSD) after termination of pregnancy (TOP), miscarriage, perinatal death, stillbirth, neonatal death, and failed in vitro fertilisation (IVF)., Methods: Electronic databases (AMED, British Nursing Index, CINAHL, MEDLINE, SPORTDiscus, PsycINFO, PubMEd, ScienceDirect) were searched for articles using PRISMA guidelines., Results: Data from 48 studies were included. Quality of the research was generally good. PTS/PTSD has been investigated in TOP and miscarriage more than perinatal loss, stillbirth, and neonatal death. In all reproductive losses and TOPs, the prevalence of PTS was greater than PTSD, both decreased over time, and longer gestational age is associated with higher levels of PTS/PTSD. Women have generally reported more PTS or PTSD than men. Sociodemographic characteristics (e.g., younger age, lower education, and history of previous traumas or mental health problems) and psychsocial factors influence PTS and PTSD after TOP and reproductive loss., Conclusions: This systematic review is the first to investigate PTS/PTSD after reproductive loss. Patients with advanced pregnancies, a history of previous traumas, mental health problems, and adverse psychosocial profiles should be considered as high risk for developing PTS or PTSD following reproductive loss.
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- 2015
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17. Attitudes and intention to donate oocytes for research.
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Purewal S and van den Akker O
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- Adolescent, Adult, Child, Female, Humans, Infertility, Female therapy, Middle Aged, Social Behavior, Surveys and Questionnaires, Young Adult, Attitude, Biomedical Research ethics, Child Rearing psychology, Infertility, Female psychology, Intention, Oocyte Donation psychology, Tissue Donors psychology
- Abstract
Objective: In 2007, the Human Fertilization and Embryology Authority permitted oocyte donation for research through voluntary donation or within an oocyte share model. The aims of this study were to investigate volunteer (nonpatient) women's attitudes and intentions to donate using components of the Theory of Planned Behavior and their attitudes toward parenthood through structural equation modeling., Design: Questionnaires., Setting: Online., Patient(s): A total of 253 nonpatient women., Main Outcome Measure(s): Attitudes towards oocyte donation for research and reasons for parenthood scale., Result(s): Of the 253 respondents, 94 were potential donors, 98 were possible donors, and 61 were non-donors. Most potential donors (68%) reported no preference towards donating their oocytes for research or an infertile couple. Structural equation modeling revealed that age (beta = -.03) and components of the TPB (beta = .16) had a statistically significant direct effect on intentions to donate for research. Attitudes toward parenthood was not linked to intentions to donate for research., Conclusion(s): There appears to be a strong altruistic motive along with the theoretical underpinnings of positive attitudes, feeling supported, and accepting the consequences of oocyte donation for research, suggesting these have the potential to inform recruitment practices and tailor clinical services., (Copyright 2010 American Society for Reproductive Medicine. Published by Elsevier Inc. All rights reserved.)
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- 2010
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18. British women's attitudes to surrogacy.
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Poote AE and van den Akker OB
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- Adult, Female, Humans, Middle Aged, Pregnancy, Socioeconomic Factors, United Kingdom, Attitude, Public Opinion, Surrogate Mothers psychology, Women psychology
- Abstract
Background: There has been little interest in the research literature on public opinions regarding assisted conception and surrogacy, particularly in European countries, despite the growing evidence showing that problems in adaptation and coping may be related to perceived normative values. This study investigated British women's attitudes to surrogacy using components of the theory of planned behaviour (TPB)., Methods: Questionnaires on attitudes to surrogacy and reasons for parenthood were completed by 187 women from the general public., Results: Significant socio-demographic differences were found between women who were possibly willing (n = 76) and those who were unwilling (n = 111) to become surrogate mothers. General attitudes to surrogacy also differed between groups (P = 0.000). This study supported the predictive utility of components of the TPB, and differentiated adequately between groups on attitudes to recruitment for surrogacy (P = 0.000), the consequences of surrogacy (P = 0.000), factors that induce people to become surrogates (P = 0.000), social support (P = 0.000), having personal control (P = 0.002) and reasons for parenthood (P = 0.000). Age (P = 0.000), attitudes to advertising (P = 0.02) and the consequences of surrogacy (P = 0.05) predicted (un)willingness to become a potential surrogate mother., Conclusions: Further research is needed with larger sample sizes of potential surrogates to determine whether the predictive attitudes reported here translate to actual behaviours. The larger group which was not interested in considering becoming a surrogate scored significantly more negatively on all attitudes towards surrogacy. The negative attitudes reported by the 'unwilling to consider being a surrogate' group may reflect attitudes held by the majority of the population and are likely to be influenced by reports of stigma associated with surrogacy.
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- 2009
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19. A review of family donor constructs: current research and future directions.
- Author
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van den Akker O
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- Biomedical Research, Child, Child Welfare, Family, Female, Humans, Male, Public Opinion, Reproductive Techniques, Assisted ethics, Reproductive Techniques, Assisted legislation & jurisprudence, Tissue and Organ Procurement ethics, Tissue and Organ Procurement legislation & jurisprudence, United Kingdom, Germ Cells, Reproductive Techniques, Assisted trends, Tissue Donors legislation & jurisprudence, Tissue Donors psychology, Tissue and Organ Procurement trends
- Abstract
This review addresses research on gamete donors, recipients, and offspring and demonstrates that the foci on all three within the triad are largely directed at disclosure or anonymity; and each in turn centers on the perceived importance of the genetic link. The importance attached to genetics has led some countries to review the ethics of anonymous gamete donation (e.g. New Zealand's 'open system' of information sharing) and has led other countries (Sweden, Austria, Victoria, Australia; the Netherlands, the UK) to change their laws allowing donor gamete offspring the right to obtain identifying information about their genetic parent. This review demonstrates that genealogical inconsistencies between and within members of the triad are common regardless of legislation. A discussion of future trends and concerns, relating to the use of gamete donation and the effects legislation is likely to have on the donor triads in the UK following 2005, is provided. The review also addresses the importance of testing theoretical models within future research, and argues this would lead to a better understanding of the underlying problems encountered at a psychosocial level, such as continued preference for anonymity in donors and denial in large numbers of users of the involvement of a donor in conception. Lack of disclosure effectively prevents true implementation of legislation; if a child is not informed, it is the result of donated gametes, it cannot take up the legally available option of finding out identifiable information about their genetic parent(s).
- Published
- 2006
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20. The sexual health of boys and men. Attitudes to adolescent boys' sexual and reproductive health urgently need changing.
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van den Akker O
- Subjects
- Adolescent, Adolescent Behavior, Female, Humans, Male, Sex Factors, Attitude to Health, Sexual Behavior
- Published
- 2000
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