Death

Sometimes the sperms die before they meet the eggs - Infertility
Sometimes it is killed - Spermicide
Sometimes it meets and life is born and aborted - Abortion
The fortunate or unfortunate one makes it through all this and is faced with this chaotic world. Shocked, it enters with a cry.
Some succumb, to various diseases waiting to take it away to where it came from.
To make the first birthday it's a big struggle.
It struggles to hold its neck, to turnover, to crawl, to sit, to stand, to walk. It's a struggle but it manages.
Even before it can reach 2 it's pushed into PreKG. It's a struggle.
It has to be in school at time when even it's father will still be in bed. It's a struggle right from PreKG to LKG to High School to Higher Secondary. Then college to job to wedding to having it's own baby to death. The path is not rosy.
At every stage the struggle only gets tougher.
Some die half way making all the struggle they went through to reach that stage just meaning less. All the struggle goes in vain. There is absolutely no meaning to all the suffering.