What happens to the other millions of sperms when one sperm dues with the ova

There are about 200 million sperms produced in a single ejaculation. Most of the sperms are killed by the acidic fluids inside the vagina, others are trapped inside the mucus membrane while the rest are attacked and destroyed by the white blood cells. As few as 200 make it to the fallopian tube. Only one sperm fertilizes the egg. The rest are destroyed by the immune system.