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Biomedical subjects

A Purdie

Publications and source records attributed to A Purdie.

8 recordsLinked to original sources
PubMed1996

Donor insemination programmes with personal donors: issues of secrecy.

This study involved 46 recipients and donors in personal donor programmes interviewed anonymously by postal questionnaire and interview: 38% (30/80) of possible recipients responded. The total number of people told about the donor involvement ranged between two and 78, with no significant gender difference. Relationships had changed for half of the participants in the programmes with 75% reporting that they had developed a closer relationship and 25% reporting a deterioration. Contact between couples and donors was seen as being in the original role of family friend or relative rather than as donor. An equal proportion of recipients (63%) and donors (78%) agreed to the donor being identified to any offspring although this was qualified with regard to the age of the child. Reasons for identification were given as avoidance of family secrets and the rights of the child to have information concerning their conception. Those who did not agree said that the child was better off not knowing, or who wished to preserve donor anonymity. The donor group was more likely than the recipients to say that identification to the child was in the best interests of the social parents because it allowed all those involved to feel part of a single family group. It was found that for both recipients and donors, the advantages given for having a personal donor was openness within the relationship. For the recipients, this focused on knowledge of the donor background and, for related couples, having a common genetic relationship. For donors, the advantages given were: knowing the child's environment, having access to a child and the ability to choose recipients. A disadvantage for donors and recipients was the possibility of a change in the relationship and for donors an added disadvantage was having to share in the emotional stress of the treatment and negative outcomes. More men than women placed importance on having a donor with a similar genetic background.

Adult↗
PubMed1994

Attitudes of parents of young children to sperm donation--implications for donor recruitment.

An anonymous questionnaire was circulated to parents of young children to survey exposure to publicity about and attitudes to sperm donation (n = 192 couples; 50% response rate). Of those surveyed, 55% of men and women had seen or heard of the need for sperm donors; for 26% of couples, one or both partners had considered donation, and among half of those (13% of total) no objections to donating were raised. However, only two men had approached the clinic as donors. Objections to donation centred mainly on discomfort at having children outside their family, worry about future contact with donor insemination children, and worry about incest. Women were three times as likely to raise these objections as men. Of all respondents, 20% thought a donor should be used for only one recipient couple, while 50% suggested three or fewer families. Overall, 41% rated having non-identifying information about the recipient couple(s) as an important aspect of sperm donation, although only 9% of men and 17% of women considered personal contact important. While many people are aware of and receptive to the idea of being donors, very few act. Many would prefer that their spermatozoa were used for only one or a few couples about whom they had some information.

Adult↗
PubMed1992

Identifiable semen donors--attitudes of donors and recipient couples.

Fifty-three couples embarking on donor insemination (DI) replied to an anonymous questionnaire asking what they wanted to know about the donor should they become pregnant. Fifty-one percent were definitely and 32% probably going to tell a child of its donor origins. Items most frequently listed for themselves and on behalf of a child were--interests/sports (57%), physical attributes (41%), occupation (37%) and family background (26%). Forty-two percent of the women and 28% of the men thought the child should have access to the identity of the donor eventually. Thirty-eight donors were surveyed by a questionnaire; 68% were agreeable to their identity being available to a donor insemination child when the child reached maturity. When the category of identifiable donor was created, 20 of 36 (56%) new donors and donors still donating chose this option.

Adult↗
PubMed1991

Immunohistochemical assessment of ER-P31, a mouse anti-oestrogen receptor protein monoclonal antibody in human breast cancers: comparison with ER-ICA (Abbott) and radioligand assays.

A new mouse anti-oestrogen receptor (ER) monoclonal antibody, ER-P31, has been developed. Comparisons of immunohistochemical detection of ER in human breast cancers using ER-P31 with anti-ER from ER-immunocytochemical assay (ER-ICA; Abbott Diagnostic Division) and radioligand dextran-coated charcoal (DCC) assays were carried out. A total of 63 breast cancers, both ER-negative and -positive, were tested. A highly significant degree of correlation between immunostaining for ER-P31 and both ER-ICA and DCC assays was obtained. It is hoped that once ER-P31 is widely available commercially, determination of ER status in breast cancers should be routinely and economically available to all women with breast cancer. Moreover, with the introduction and implementation of a screening programme for detecting breast cancers, immunocytochemical determination of ER status in unequivocal and equivocal positive fine-needle aspirates of breast lesions can be readily performed.

Alkaline Phosphatase↗
PubMed1983

Molecular aspects of embryonic mouse haemoglobin ontogeny.

Embryos from C57BL/6J mice between the gestational ages of 9 and 16 days possess three embryonic haemoglobins EI, EII and EIII, the proportions of which change as a function of gestational age. Component EI, originally present at approx. 65% at day 9, decreases to approx. 20% by day 16, while component EII increases in an inverse manner to that of component EI. During this period component EIII remains essentially constant at approx. 25%. Separation of these species by ion-exchange chromatography has allowed the characterization of the Hill coefficient, Bohr effect, heat of oxygenation and binding of allosterically active organic phosphates for each component. The three components show marked functional heterogeneity and also differ from maternal haemoglobin. Oxygenation curves for whole embryonic blood show distinct deviations from simple binding behaviour. The presence of a high-affinity component within the blood samples may be accounted for by the presence of haemoglobin EI. By using parameters obtained from the study of the isolated components it has been possible to synthesize mathematically the O2-binding curves, obtained experimentally, throughout the gestational period. The characteristics of the isolated haemoglobin components of embryonic mouse blood are discussed in terms of the changing demands for O2 likely to be encountered by the developing embryo.

2,3-Diphosphoglycerate↗