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Should we make parents of the dead?(Bioethics)
OUR SOCIETY believes that children are best raised by those who gave them life--their biological parents--and that every effort ought to be expended in sustaining and strengthening parental relationships. While continuing to uphold the important and complementary roles of mothers and fathers, our society also acknowledges that it might not always be possible for children to be nurtured by both parents. One parent might die or the relationship between them might collapse. But public policies making it possible for one parent to care for a child do not deny or detract from society's overarching commitment to the ideal of children being raised by both their biological ...
- Sperm with bent tails point to possible male contraceptive.(BIOMEDICINE)
- Magazine article from: Population Briefs May 1, 2005 700+ words
...infertility. Hunnicutt placed the sperm under the microscope and immediately...bend back upon themselves. The sperm have an appearance very similar to those seen in some infertile men. During normal development, sperm cannot swim when they are extruded...
- Sperm may follow rising temperature to egg. (Heat-seeking missiles).
- Magazine article from: Science News Travis, J. February 1, 2003 700+ words
...problem with [the] studies is that so few sperm appear to respond." Assuming that human sperm navigate by temperature, Eisenbach envisions...thermotaxis assay to evaluate the fitness of a man's sperm. An unusually large number of sperm unresponsive...
- Live sperm, dead bodies. (includes commentaries)
- Magazine article from: The Hastings Center Report Nolan, Kathleen Rothman, Cappy Miles Ross, Judith Wilson January 1, 1990 700+ words
...to restrict or regulate sperm retrieval. To date...children have been born from sperm stored after such recovery...advances have enabled men with vas obstruction to...aspirating epididymal sperm. Such valuable and available...store his sperm? And if a man can store sperm ...
- Sperm counts are dropping.(Vital Signs)
- Magazine article from: World Watch Halweil, Brian March 1, 1999 700+ words
The average sperm count of men in the United States and Europe...century. A study of 1,350 Parisian men showed sperm counts declining from 89 million...have been demonstrated in Danish men, Finnish sperm counts appear unchanged. And a...
- Sperm's fertilizing potential in male smokers now the focus of study.
- Newspaper article from: OBGYN & Reproduction Week February 17, 2003 700+ words
...to stop smoking. Sperm samples will be collected...before and after the men quit. The study is...Hospital of Buffalo. Sperm from healthy men were subjected to...and tight binding of sperm to the egg, leading...said Burkman. "In men who smoke, these...
- Sperm transplant in mice may lead to infertility treatment.
- Newspaper article from: Knight Ridder/Tribune News Service FitzGerald, Susan November 6, 2004 700+ words
...treat infertility in men. The sperm stem cells were grown...later reimplanted. Sperm stem cells from an infertile man might be made to proliferate...half the time, the man has a problem. The...it takes to produce sperm stem cells and go on...
- Sperm polymorphism within the sea urchin Strongylocentrotus droebachiensis:...
- Magazine article from: The Biological Bulletin Marks, Jessica A. Biermann, Christiane H. Eanes, Walter F. Kryvi, Harald October 1, 2008 700+ words
...Introduction Current theory on variation in sperm morphology focuses on male-female co-evolution and male-male competition. Sperm competition has emerged as an important selective force in shaping sperm quality in snakes (Tourmente et al...
- Two (sperm) heads are better than one.
- News wire article from: United Press International July 10, 2002 700+ words
Jul 10, 2002 Among sperm dashing to the fertilization line, cooperation...it means defeat for all but one, the sperm hook up by the hundreds or thousands to...contender. In the all-for-one push, the sperm start teaming up a minute or two after...
Source: HighBeam Research, Should we make parents of the dead?(Bioethics)