adsense and wordpress

Is there a plugin which allows me to only add adsense ads in the invidual link (permalink) and in between paragraphs?

Here’s the catch: I only want the adsense to appear after some time (let’s say: after 1 week, 1 month etc) after I have posted it.

This means, the entry will show adsense ads only after some time. And the ads only need to appear in the individual entry page and not on the front page.