The vasectomy has a higher chance of side effects than the IUD. FWIW. And, a higher chance of accidental pregnancies.

The copper IUD is a non hormonal option for your wife. However, I love my hormonal, low dose IUD. I have a high risk of blood clots and heart issues, and the IUD was cleared for me. Until my Lupus is stabilized a pregnancy could be life threatening for me, if I can ever carry to term.

There's a newly approved birth control pill for men, which I know nothing of, but it might be an option.

Me: 30
Him: 39
Together 5 years
Married the very best man in the world 04/06/2013 after being common law for too long. I'm a lucky woman.
7 Cats - Viscount Ashley of Leftfield, Pawkie Petunia, The Timinator, Leo the Lionheart, Fruit Snack, Cloud, and Barret
And our very lucky pony, Starbucks