Obviously, whether fertility is good or bad at a given moment depends on the judgment of the individual involved.
Which is your opinion. And you are free to have it. Catholics are also free to believe that fertility is *always* a good thing.
Quite frankly, I don't know why anyone would think at *any* time fertility could ever be a bad thing. Again, not the physiological responses (good or bad) to fertility, but fertility *itself*. Because again, without it, humanity would cease to exist.
But it's a free country I guess.