"Inverto-fertilization" is not a recognized term in biology or related fields. It's possible there's a misunderstanding or a typo.

Here's what might be happening:

* Typo: Perhaps you meant "in vitro fertilization" (IVF), which is a common and well-established assisted reproductive technology where eggs are fertilized by sperm outside the body.

* Misunderstanding: You may be thinking of a specific biological phenomenon that has a different name. Please provide more context or a definition of what you think "inverto-fertilization" might mean.

Please clarify your question so I can help you better!