Does this argument extend to suggesting that we have a moral duty to create life as long as that life lives a good life? If you you only have one child, should

Does this argument extend to suggesting that we have a moral duty to create life as long as that life lives a good life? If you you only have one child, should you have more? If we can raise animals humanely and kill them humanely, is that actually ethical? Is it better for a cow to have lived a couple of years versus have never been born at all?