News tagged with female fertility
Men can rest easy -- sex chromosomes are here to stay
Fears that sex-linked chromosomes, such as the male Y chromosome, are doomed to extinction have been refuted in a new genetic study which examines the sex chromosomes of chickens.
May 08, 2012 |
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A new role is hatched for female fruit flies
A team of New York University biologists has uncovered a previously unknown role for a set of cells within the female reproductive tract of fruit flies that affects the functioning of sperm and hence fertility. Their discovery, ...
Nov 08, 2011 |
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Wandering females give stags the slip
The fierce battles of rutting stags may be the most famous symbols of males competing over females in the animal kingdom. But it turns out the stags don't have things all their own way.
Oct 19, 2011 |
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Single dose of contraceptive vaccine controls fertility in cats for years
(PhysOrg.com) -- University of Florida researchers, in collaboration with the U.S. Department of Agriculture, report that a single dose of an immunocontraceptive vaccine controls fertility over multiple years in adult female ...
Sep 30, 2011 |
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Chickens eject sperm from males they don't fancy
New research finds that even though hens aren't terribly picky about their mates, they are picky about whose sperm makes it to the egg.
Aug 25, 2011 |
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Fish placenta is unfavourable survival strategy
Fish with a placenta struggle to adapt to rapid changes in the food supply. They probably evolved in a stable, food-rich environment. As ecosystems change under the influence of humans, they are experiencing greater difficulty ...
Jul 11, 2011 |
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Mother's obesity may lead to infertility in the next generation
Levels of the hormone ghrelin are low in obese women and a recent study accepted for publication in Endocrinology, a publication of The Endocrine Society, reports that mice whose mothers had low ghrelin levels were less f ...
Mar 23, 2011 |
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Hormonal birth control alters scent communication in primates
Hormonal contraceptives change the ways captive ring-tailed lemurs relate to one another both socially and sexually, according to a Duke University study that combined analyses of hormones, genes, scent chemicals and behavior.
Jul 27, 2010 |
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What she sees in you -- facial attractiveness explained
(PhysOrg.com) -- When it comes to potential mates, women may be as complicated as men claim they are, according to psychologists.
Medicine & Health / Psychology & Psychiatry
Aug 24, 2009 |
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Good males are bad fathers
Contrary to predictions, males of high genetic quality are not very successful when it comes to fertilizing eggs. A new study on seed beetles by Swedish and Danish scientists Göran Arnqvist and Trine Bilde shows that when ...
Jun 25, 2009 |
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Researchers identify key proteins needed for ovulation
Researchers from the National Institutes of Health and other institutions have identified in mice two proteins essential for ovulation to take place.
Medicine & Health / Medical research
May 14, 2009 |
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Late motherhood boosts family lifespan
Women who have babies naturally in their 40s or 50s tend to live longer than other women. Now, a new study shows their brothers also live longer, but the brothers' wives do not, suggesting the same genes prolong ...
Medicine & Health / Medical research
May 04, 2009 |
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Reproductive life of male mice is increased by living with females
Living with a female of its species can extend the reproductive life of a male mouse by a dramatic 20 percent, according to a study reported at the online site of the journal Biology of Reproduction.
Biology /
Jan 22, 2009 |
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