Reproductive Biology Quotes

The urgency to mate persists in all people as in all other mammals because of the evolutionary drive to continue the species, the inborn imperative for genes to reproduce and hormonal differences that evolved over millions of years.

As regards the individual nature, woman is defective and misbegotten, for the active power of the male seed tends to the production of a perfect likeness in the masculine sex; while the production of a woman comes from defect in the active power.

I didn't know how babies were made until I was pregnant with my fourth child.

To create is divine, to reproduce is human.

One of the aims of sexual union is procreation - the creation by reproduction of an image of itself, of the union.

Men would make love with any number of women ... even total strangers, while females were selective. They were catering to the demands of one small egg. While males had millions of frantic sperms screaming: "Let us out, let us out!".

Man comes not from an egg but from an animalcule that is found in male sperm.

In the immortal germ line of human beings - that is, the eggs that sit in the ovaries - they actually sit there in a state of suspended animation for up to 50 years in the life of each woman.

A million million spermatozoa, All of them alive: Out of their cataclysm but one poor Noah Dare hope to survive.

My first ideas of human in vitro fertilization (IVF) arose with my Ph.D. in Edinburgh University in the early 1950s. Supervised by Alan Beatty, my research was based on his work on altering chromosomal complements in mouse embryos.

My body feels like it is asking to reproduce.

Man is developed from an ovule, about 125th of an inch in diameter, which differs in no respect from the ovules of other animals.

We cannot conceive how the Foetus is form'd in the Womb, nor as much as how a Plant springs from the Earth we tread on ... And if we are ignorant of the most obvious things about us, and the most considerable within our selves, 'tis then no wonder that we know not the constitution and powers of the creatures, to whom we are such strangers.

I wonder if most people ever ask themselves why love is connected with reproduction. And if they do ask themselves about this, I wonder what answer they give.

In entirely unrelated news, there's a new proposal to mandate coverage for gay infertility. The problem is that gay infertility is just biology. Two men and two women are not infertile. They're just not capable of impregnating each other. This isn't a medical problem. It's a mental problem.

Just as I wouldn't expect a gynecologist to have a debate with somebody who believes in the Stork-theory of reproduction, I won't do debates with Young Earth creationists.

The biggest development in reproductive biology is the birth-control pill. Nobody ever talks about it, but look at the consequences: demographics; aging populations; the sinking population of Europe, Japan; immigration. It's incredible.

I was watching the Animal Planet. Did you know that the male seahorse has the baby? Why don't they just call that one the female?

Does anyone ask their parents how they are conceived?

And I think the female creative urge is intrinsically biologically linked to our ability to give birth to a child, even if we've never... I've never given birth, but I feel like it's part of our psychology.

The independent role of morphology in mate choice is revealed by the rare instances where the usual association between song and morphology is disrupted.

In cloning, in contrast, reproduction is asexual - the cloned child is the product not of two but of one.

You know, quite a few species of fish require two or more sexual partners.

Darwin theorized that mankind (both male and female) evolved alongside each other over millions of years, both reproducing after their own kind before the ability to physically have sex evolved. They did this through "asexuality" ("without sexual desire or activity or lacking any apparent sex or sex organs"). Each of them split in half.

Most of the psychological differences between men and women seem to come from differences in their reproductive system