we are having the same discussions in this house..
im unsure thought so its harder..

if your both happy with just one thats great get it done. the drs will prob ask alot of questions anyway when you go in for the appointment.

remember it can always be reversed.

and if the main reason is your libido, maybe look at other ways to increase it, it could eb as simple as teh wrong pill for you, or your hormones are out of wack since having your baby etc etc