Is Unprotected Sex Safe For A Woman After Menopause?

my wife is 52 she stopped her periods 2 years ago though they did stop intermittent prior for a further year or so they stopped properly 2 years ago however they did come back in between this time say after 1 year for a time period of 2 cycles( 2 months ) ? for some reason ? though she has had no periods at all or any signs of menstruating from this time on i have been wearing condoms for intercourse for over 10 years our question is after all this time of my wife having no periods can we have intercourse without any condoms naturally with no doubt pregnancy would not happen or is there a simple test our GP can do to confirm please if you could answer this it would be very helpfull