Results 211 to 220 of about 15,112 (263)

Reproductive Skew and the Origin of Sterile Castes

The American Naturalist, 2003
Reproductive skew theory has not heretofore formally addressed one of the most important questions in evolutionary biology: How can whole-life sterile castes evolve? We construct a transactional skew model investigating under what conditions a subordinate in a multimember group is favored to develop into a morphologically specialized worker caste.
Joonghwan, Jeon, Jae Chun, Choe
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Reproduction control in fish. II. Delayed reproduction and sterility

1979
Lorsque la maturation sexuelle s'accompagne d'une baisse de la rentabilité économique, l'application de méthodes visant à retarder ou à inhiber définitivement la gamétogenèse peut constituer une solution intéressante : — La production d'animaux à maturation tardive peut être attendue de techniques modifiant les facteurs environnementaux (photopériodes ...
Chevassus, B., Blanc, J.M., Chourrout, Daniel   +2 more
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GENETIC ENGINEERING OF REPRODUCTIVE STERILITY IN PINUS RADIATA

Acta Horticulturae, 1998
Generation of transgenic trees for reproductive incompetence is an important application of genetic engineering to commercial forestry. This involves isolation and characterisation of the regulatory regions of the genes expressed at the very early stages of male and female reproductive organ development.
A. Mouradov, T. Sawbridge, B. Hamdorf, T. Glassick, L. Murphy, S. Marla, Y. Yang, R.D. Teasdale   +7 more
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Sterilization, Privacy, and the Value of Reproduction

1978
In this paper I will discuss some issues associated with the ethics of sterilization. The main issues I shall discuss are whether the capacity to procreate, which of course is destroyed by sterilization, is an important capacity worth preserving, and whether involuntary sterilization violates the right to privacy.
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Reproduction, Ethics, and Public Policy: The Federal Sterilization Regulations

The Hastings Center Report, 1979
After 6 months of public hearings and a controversial climate the Department of Health Education and Welfares rule governing federal financial participation in sterilization programs went into effect in the United States on March 8 1979. The regulations attempt to formulate a government policy for some difficult ethical questions -- the meaning of ...
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Virgin Births and Sterile Debates: Anthropology and the New Reproductive Technologies

Current Anthropology, 1992
Embryo research in Britain has been controversial and the 1984 Warnock report on human fertilization and embryology has been in the center of the battle over the legality of embryo research. Research is permitted under Parliamentary decision as of April 23 1990.
Cris, Shore, R G, Abrahams, Jane F, Collier, Carol, Delaney, Robin, Fox, Ronald, Frankenberg, Helen S, Lambert, Marit, Melhuus, David M, Schneider, Verena, Stolcke, Sybil, Wolfram   +10 more
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[Psychosomatic aspects of sterility and assisted reproduction].

Orvosi hetilap, 1993
The authors survey the literature of psychosomatic aspects of infertility, in-vitro-fertilization and embryo transfer. They emphasize the most important thesises of psychosocial and psychodynamical approaches. The changing of sexual and marital relationship of infertile couples are analysed as well.
A, Forgács, P, Szeverényi
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[GIFT: reproductive reality for the sterile couple].

Ginecologia y obstetricia de Mexico, 1991
From June 1987 thru December 1988, 72 patients entered our gamete intrafallopian transfer (GIFT) program. The average age of our patients was 28 years with of infertility. The causes for being selected to the program were: Unknown (14), Endometriosis (14), Male (13), Ovarian (5), Cervical (9), Tubo-peritoneal (6) and oocyte donation (11).
S, Hernández Ayup, R, Santos Haliscak, M, García Martínez, F, Morales Caballero, R, Loret de Mola Gutiérrez, P, Galache Vega   +5 more
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Comments on “Sterilization, Privacy, and the Value of Reproduction”

1978
Joseph Ellin has written a provocative paper on the matter of procreation and sterilization. Although he concludes that involuntary sterilization violates a basic right to privacy, not many will be satisfied with his argument that this is unrelated to a right to procreate, and that the latter interest in procreation is not an “important” interest to ...
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Reproduction in mules: Embryo transfer using sterile recipients

Equine Veterinary Journal, 1985
Summary Nine intraspecies horse embryos and four intraspecies donkey embryos were recovered non‐surgically on Days 7 or 8 after ovulation and transferred surgically to recipient mules. Five of the horse embryos and three of the donkey embryos were transferred to cycling mules that had ovulated five to seven days before transfer as ...
C. J. DAVIES, D. F. ANTCZAK, W. R. ALLEN
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