Low fertilization rate- Day 1

Hi, we retrieved 10 eggs, all mature. We used zymot (we have 37% dna fragmentation but doctor wasn’t concerned).

Out of the 10 eggs, 3 fertilized, 4 are under observation, and 3 did not fertilize.

Is there a reason our fertilization rate seems so low? I don’t really have hope for the 4 under observation, as I read on Reddit from other women that those ones don’t really come to fruition.

Any advice?