Conception (noun)

1. The action or process of forming an idea or impression in the mind.
2. The point at which a woman becomes pregnant.
3. An idea or plan formed in the mind.

Origin:

Middle english: from old french, or from latin conceptio(n-), from concipere "take in, conceive".

Examples:

1. The conception of the project was the easy part, it was the execution that proved difficult.
2. She had a difficult conception due to her age and health.
3. The conception of the novel was brilliant, but the execution was lacking.
4. She had a sudden conception of how to solve the problem.
5. His conception of a perfect society was utopian.