Because most of the sperm cells die on their journey to the egg.
In plants, fertilization occurs when one sperm cell from a pollen grain fuses with an egg cell to form a seed. Therefore, only one sperm cell is needed to fertilize one egg cell and produce a seed.
Typically, when sperm enters the female reproductive tract, millions are released, but only one sperm is required to fertilize an egg. In a normal scenario, out of the millions of sperm, only a few hundred reach the vicinity of the egg, and usually just a single sperm penetrates the egg’s outer layer to achieve fertilization. The process is highly competitive, and the vast majority of sperm do not reach the egg at all.
Most 99.99% of the time only one is supposed to.
Typically, only one sperm fertilizes an ovum to form a zygote. Multiple sperm attempting to fertilize the ovum can lead to abnormalities in the resulting embryo.
Just one.
one
Only one sperm is required to successfully fertilize an egg.
Only one sperm cell is required to successfully fertilize an egg.
Then the male can transfer sperms to your body through ejaculation. And one of these sperms will meet an ovum in your body, fertilize it and become a baby.
Because most of the sperm cells die on their journey to the egg.
For the same reason an Oak tree produces so many acorns. So that maybe one of them manages to make it to the egg and fertilize it.
because some of the sperm cells might be in-active therefore the healthiest one will fertilize the egg
Only one sperm is required to fertilize an egg. One is both necessary and sufficient in order for an egg to be fertilized. But in order to be confident that one will make it, you need a certain minimum sperm count.
This normally happens in fallopian tube. Many sperms are needed to dissolve the outer coat of the egg. Only one can penetrate the egg to fertilize the same.
Many sperm cells are needed to fertilize an egg cell because only one sperm cell can successfully penetrate the egg cell's protective layer and fuse with its nucleus to form a zygote. Competition among the sperm cells ensures that the strongest and healthiest sperm cell is most likely to successfully fertilize the egg.
Only one.