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New evidence for female control in reproduction
11-19-2007 · EurekAlert!Adding another layer of competition to the mating game, scientists are reporting possible biochemical proof that the reproductive system of female mammals can "sense" the presence of sperm and react to it by changing the uterine environment. This can be the molecular mechanism behind promiscuous female choice, in which females that have mated with several partners play a role in determining which sperm fertilizes their egg.
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Keywords: evidence, female, control, reproduction
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07-31-2007 · EurekAlert!
A research team, including UC Riverside biologists, has found experimental evidence that supports a controversial theory of genetic conflict in the reproduction of those animals that support their developing offspring through a placenta. The conflict has been likened to a "battle of the sexes" or an "arms race" at the molecular level between mothers and fathers. At stake: the fetus's growth rate and how much that costs the nutrient-supplying mother.
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02-10-2008 · EurekAlert!
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07-12-2007 · Massachusetts Institute of Technology (MIT)
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07-04-2007 · EurekAlert!
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06-25-2007 · EurekAlert!
Male fowl are more sexually active in the evening when fertilization is more likely, but females change depending on the population. Females solicit sex in the evening in female-biased populations, where females have more control. However, in male-biased populations, male sexual harassment of females is intense, especially in the evening, so females solicit sex early in the morning and avoid males in the evening.
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12-06-2006 · EurekAlert!
A study of polycystic ovary syndrome (PCOS) provides further evidence that calpain-10, the "diabetes gene," is related to PCOS susceptibility. PCOS affects up to five percent of the female population, and those diagnosed with the disease have a 2- to 7-fold risk of developing type 2 diabetes mellitus. The data suggest that one area of the gene, the SNP ins/del-19, may be related to both PCOS and type 2 diabetes.
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01-18-2008 · EurekAlert!
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10-18-2006 · EurekAlert!
Dopamine (DA) not only functions as a neurotransmitter, a chemical messenger between neurons by which one neuron triggers another, researchers have found. It also appears to coordinate the activity of a particular neural circuitry. In studies with mice, they found evidence that the dopamine deficiency in Parkinson's and other related movement disorders may cause loss of muscle control and paralysis due to disruption of coordinated activity in this circuit.
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