There is no method by which it can be found whether an egg would fertilize or not. The only way to do that is by letting them fertilize only.
The peculiar thing with an ovum is that a woman might be producing a low amount of eggs or may have an inadequate reserve of ovum in her ovaries, however; she might be producing good quality of eggs. Similarly, a woman with a good reserve of eggs may not produce healthy or good quality eggs.
The only way by which the quality and competency of a woman’s eggs can be determined is by mapping her AMH levels. These levels are the actual measures of deciphering the condition of the fertility of a woman.