Not only biologically but also There are thousands of younger 30ish women who'd see 0 problem have a kid with a mature 40 y.o. (rather than a 30 y.o. whos head is not there yet)
Of course you probably wont have the same relationship with your wife but thats your life, not hers. And if you wake up with panic attacks over kids you HAVE to do it or youll never forgive yourself in 10 / 20 years.
And if you feel guilty about reversing your decision to be childless, think that same way that you can give and take back consent any time, you have the right to change your mind anytime.