More young people choosing permanent sterilization after abortion restrictions, new research shows

There are different types.

A reversible vasectomy is one where they fill something in the tubes to block the flow.

However even in this case chances of reversal is low and it costs 20X more.

An irreversible vasectomy is where they cut the tube, seal their ends and tie the severed ends together.

It's really difficult and costly to reverse and most of the time impossible. Surgery to reverse a permanent vasectomy may also lead to complications that may or may not be life threatening.

And yeah insurance providers may not cover it.

Exactly how reversible they are depends on the type. Regardless of the type though the sucess rates for reversal aren't great. If you're lucky andyours is easy to reverse then there is an 80% chance of sucess for a reversal. I also highly doubt most insurance companies cover reversal so prepare to pay thousands of dollars out of pocket for that maybe 80% chance. A vasectomy should always be considered permanent and any doc performing one will tell you that.

IIRC ease to make, fairly hard to reverse, but possible.
So it's way more expensive and even then not reversible in 100% cases.