In antagonistic coevolution, the male and female sex organs
evolve in shape to balance for the traits of the other, while congruent coevolution more involves changes that mirror one another over time.
CARDIFF scientists have uncovered a worrying trend of shrinking male sex organs
in otters - in what experts warn is also becoming a human problem.
Craig Bowman, 42, who calls himself Emma but is still thought to have male sex organs
, could now be moved from category A New Hall jail.
The controversial treatment halts puberty, stunting sex organs
and preventing the growth of facial hair and sperm in boys, and breasts in girls.
This will include explicit images in mixed classes of male and female sex organs
and graphic details of sexual intercourse.
South Africa's use of the pesticide DDT for malaria control in the Limpopo River basin is likely to lead to an increase in babies being born with deformed sex organs
or being born with both male and female genitalia.
However, the best theory to date is that the offed oysters matured too fast due to abundant plankton (which they eat) and have wasted energy growing over-developed sex organs
As the eels swim, the cadmium previously stored in fat cells is released and accumulates in their sex organs
But she and her fellow beachgoer were "dismayed" to find that Bans's avatar had no sex organs
Testosterone -- the sex hormone, secreted by the testes, that stimulates the development of male sex organs
, secondary sexual traits, and sperm.
The fish, smallmouth and largemouth bass, are naturally males but for some reason are developing immature eggs inside their sex organs
However, medical treatments, including surgery on sex organs
and medications such as Viagra that directly alter sexual function are allowed.
Our popular culture may be saturated with synthetic gore, but at least we don't spend our leisure time watching real people have their eyes put out, their limbs pulverized, their sex organs
amputated and their flesh torn to pieces with red-hot pincers," he writes shortly before describing said amputation and pincer wielding.
Phthalates have been shown to damage the kidneys, liver and sex organs
in animals and some are suspected carcinogens.
So when a child is born with indeterminate sex organs
, doctors should hold off on genital surgery until the child has grown enough to identity as male or female.