But, for those of who can't conceive a life deprived of exploration, the lure of travel remains irresistible -- exactly as it should be.

CNN: Women: Travel safely, but keep traveling

Can you conceive of a 63-inch tire?

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Four years after trying to start to conceive naturally, 91% of 30 year-olds, 84% of 35 year-olds and 64% of 40 year-olds will have been successful.

BBC: The researchers evaluated women's chances of conceiving

And whoever could conceive in their wildest fantasies that 12 states of the union- including New Hampshire, Vermont, Colorado, Indiana, South Carolina and Washington would propose to allow their citizens to use gold and silver coins as legal tender.

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The other was that of the self-assured idealist who could hardly conceive, much less admit, that he could be wrong in judging matters that he deemed within his peculiar sphere of expertise.

FORBES: Fact And Comment

Only a handful of individuals could conceive that the automobile would soon put most horse-based transportation out to pasture.

FORBES: Fantasy Fears

Anecdotal evidence shows that some couples who initially struggle to conceive and have a child by IVF or adoption, later fall pregnant naturally - possibly because the stress of the situation has been lifted.

BBC: NEWS | Health | Clues to stress-infertility link