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Hirata, T.

Publications and source records attributed to Hirata, T..

2 recordsLinked to original sources

A survey of public attitudes towards third-party reproduction in Japan in 2014

Objective: The objective of this study was to examine public attitudes towards third-party reproduction and the disclosure of conception through third-party reproduction.\n\nMethods: We conducted the web-based survey for the public attitude towards third-party reproduction in February 2014. Twenty-five hundred people were recruited with equal segregation of age (20s, 30s, 40s, and 50s) and gender. We analyzed the association between gender, age, infertility, and ethical view using a questionnaire regarding donor sperm, donor oocyte, donor embryo, gestational surrogacy, and disclosure to offspring.\n\nResults: Of the respondents, 36.2% approved and 26.6% disapproved with gamete or embryo donation. The frequency of those who approved was the lowest in females in the 50-59 years age group, and was significantly higher in males or females with infertility. Secondly, 40.9% approved and 21.8% disapproved with gestational surrogacy. The frequency of those who approved gestational surrogacy was higher in males or females with infertility. Thirdly, 46.3% of respondents agreed and 20.4% disagreed with \"offspring have the right to know their origin\". Those who disagreed were primarily in the 50-59 age group of both genders, and disagreement was significantly higher in the infertility group compared with non-infertility group.\n\nConclusion: In this study, public attitudes were affected by gender, age, and experience of infertility. These study findings are important in understanding the attitude towards third-party reproduction and disclosure to the offspring. Respondents having indecisive attitudes were >30%, which might indicate an increased requirement for information and education to enhance the discussion on the ethical consensus on third-party reproduction in Japan.

scientific communication and education

Frequent Non-random Shifts in the Temporal Sequence of Developmental Landmark Events during Fish Evolutionary Diversification

Morphological transformations can be generated by evolutionary changes in the sequence of developmental events. In this study, we examined the evolutionary dynamics of the developmental sequence on a macroevolutionary scale using the teleost. Using the information from previous reports describing the development of 31 species, we extracted the developmental sequences of 19 landmark events involving the formation of phylogenetically conserved body parts; we then inferred ancestral developmental sequences by two different parsimony-based methods--event-pairing (Jeffery, Bininda-Emonds, Coates & Richardson, 2002a) and continuous analysis (Germain & Laurin, 2009). The phylogenetic comparisons of these sequences revealed event-dependent heterogeneity in the frequency of sequence changes. Most of the sequence changes occurred as exchanges of temporally neighboring events. The phylogenetic analyses suggested that the ancestral species had experienced frequent changes in developmental sequences. Although the analyses showed that these heterochronic changes accumulated along phylogenic time, the precise distribution of the changes over the teleost phylogeny remains unclear due to technical limitations. Finally, this first comprehensive analysis of teleost developmental sequences will provide solid ground on which to elucidate the significance of developmental timing in animal morphological diversification.

evolutionary biology