* Pre-: This indicates something happening *before* conception, such as "prenatal" (before birth).
* Post-: This indicates something happening *after* conception, such as "postnatal" (after birth).
* Con-: This prefix is often used to indicate a joining or coming together, and could be used to describe the process of conception itself, though it's not the most common choice.
If you're trying to create a word with a specific meaning related to conception, you may want to consider using a different approach like:
* Combining words: For example, you could use "conceptional," "conception-related," or "conception-driven."
* Using a metaphor: For example, you could use "germinal" to refer to the early stages of conception.
Ultimately, the best prefix or word to use depends on the specific context and meaning you are trying to convey.