Quotes About Reproduction

so Durrant stroked the area around his cloaca

Female African clawed frogs, when injected with the urine of a pregnant woman, lay eggs within a few hours.)

Amoebas at the start Were not complex; They tore themselves apart And started Sex.

Human vocabulary size may have evolved through the same sexual selection process that favored enormous song repertoires in some bird species. But whereas only male birds sing, both men and women use large vocabularies during courtship, because courtship and choice are mutual, and because unusual words work as reliable displays only if their meanings are understood.

Other primate penises are pencil-thin, whereas the erect human penis averages over one inch in diameter. Also, most other primates have a penis bone called the baculum, and achieve erections mostly through muscular control, like a winch raising a rigid strut. The penis bone is typical of most mammals. By contrast, the male human relies on an unusual system of vasocongestion. The penis fills with blood before copulation, like a blimp inflating before flight.

Among primates, the intensity of sperm competition correlates much more strongly with testicle size than with penis size.

Female adolescents are significantly less fertile than 20-year-olds. Female fertility declines gradually during the thirties, and declines steeply after age 40. Women after menopause are infertile. This female fertility profile is a basic fact of life to which male mate choice systems have adapted. Youth is an important cue of fertility.

Males, for example, may compete directly to copulate with fertile females or compete indirectly for food, territory, nest sites, or social status that may increase their access to fertile females. In either situation, females are not exactly "choosing" from among male competitors, but acquiescing to sex with the male that holds the food, territory, or nest site that they need in order to reproduce.

In almost all mammals and all primates, females do almost all of the child care, with very little help from males. Males could never be sure which offspring really carried their genes, whereas females could be certain. This uncertainty about paternity leads most male mammals to invest much more in pursuing new sexual opportunities than in taking care of their putative offspring.

Human penises evolved as tactile stimulators for use in copulatory courtship.

The large male penis is a product of female choice in evolution. If it were not, males would never have bothered to evolve such a large, floppy, blood-hungry organ. Ancestral females made males evolve such penises because they liked them.

Every gene in every human body has passed through thousands of penises over thousands of generations of human evolution. Equally, every gene has passed down through thousands of eggs inside female ancestors who chose to copulate with particular males. In sexually reproducing species, copulation is the genetic gateway from one generation to the next, which is what makes it so important evolutionarily, physically, and psychologically.

What is proposed is nothing but the replacement of the old unintelligent, inevitable, almost unconscious fertility by an intelligently controlled, conscious fertility, and the elimination of the mere voluptuary from the evolutionary process.

If you had yourself cloned, who exactly, would be your parents? Can you raise yourself? I guess so. And it might be fun. Just think, by the age of six you'd be driving yourself to school.

Each year thousands of embryos, no bigger than the head of a pin, are created in the process of in vitro fertilization, with the support of Congress, by the way.

Credit reproduces all the fundamental antagonisms of the capitalist world. It accentuates them. It precipitates their development and thus pushes the capitalist world forward to its own destruction.

Thus mating of females was strictly along the lines of paternal song.

I had major thyroid issues, so your fertility count does go down.

In gardens, beauty is a by-product. The main business is sex and death.

A hen is only an egg's way of making another egg.

There are too many f***ing people on the planet. Everybody's got to stop having 40 kids. We need free access to birth control and health care for women.

Women who sought ways to limit the size of their families were to Comstock proof that humankind was on the brink of self-destruction. But not all women; he focused his ire on white women of good families, who were obliged, in his view of the world, to provide heirs for the ruling class.

Yet, as I will make clear, any Pleistocene woman who relied on looks alone to pull offspring through was not likely to be a mother very long or leave descendants.

Every time new technology is introduced, especially involving reproduction, you get the 'yuck' effect.