All too often, statistics cited are like this: After age 40, the risk of having X go wrong doubles, triples, quadruples… Well, that may be, but what was the starting point of this multiplication? Was it .001% increasing to .004% Or was the starting point 20%, and the risk increasing to 80%?
And are the risks higher in certain populations? Are the risks of X higher among poor people (less likely to access pre-natal care), certain racial groups (Tay-Sachs), or among those who engage in certain activities (smokers)?
IOW, one needs to know the precise risk factor, not just scary-sounding but vague numbers; and one needs to know the exact risk factor for oneself as an individual.
A baby who is different from the norm can be born to a couple of any age. It may be slightly or quite more likely as one ages.
Whatever you decide, remember that God is not going to send you grace beforehand to deal with a potentiality–He waits until the grace is needed before He sends it. If by chance you had a baby with problems, God would send you the grace *then, *not now.
So look into the necessary *facts, *and then decide. I think if it is moral to avoid conception because the mother needs a rest or similar, then if there is a high risk of a problem with a baby, that that certainly could be a reason to abstain, but I would definitely check with a priest rather than listening to this random person on the internet
