What is the characteristic of healthy sperm cell?

Answer 1

A healthy sperm cell is usually a white color (edit: Are you sure? just because semen is white doesn't mean the sperm cell itself is white, it might just be seminal proteins making it white), it can be thick or thin depending on the types of foods the male individually eats. If the sperm is yellow, yellow/green or a dirty white, these are signs that the sperm is unhealthy and this person may have some infection. A recommendation would be to always get your partner checked, at least once a month, and before any first time sexual activity with them, :D does that answer your question? I wasn't exactly sure on what you were asking

Answer 2

There are three main elements which determine the health of sperm cells: sperm quantity, sperm quality and sperm motility.

Sperm Quantity - the number sperm cells present in one milliliter of semen. In healthy semen, an analysis would show tens of millions of sperm cells in just one milliliter. In one ejaculation, a man releases millions of sperm cells into his partner's body, but only 200 of these reach the fallopian tubes, where the egg is waiting for them, and only one of these 200 actually fertilizes the egg.

Sperm Quality - the quality of sperm may be almost as important as the quantity. It's very important for sperm cells to have a healthy structure and shape. A good-quality sperm cell has an oval head and a long tail which it uses to swim. If a man's semen contains a lot of sperm cells which have misshapen heads and tails, he is less likely to be able to fertilize his partner's egg. A semen analysis will check how many sperm cells in a semen sample have a healthy shape and structure.

Sperm Motility - this is basically the sperm cells' ability to swim forwards. After ejaculation, sperm cells need to be able to swim to the egg in the fallopian tube. The semen analysis will show how many sperm cells in a semen sample have the ability to swim forward and wriggle around.