Last Updated: March 10, 2018

Definition - What does Normozoospermia mean?

Normozoospermia is the presence of normal sperm in semen upon semen analysis. For a semen sample to be labeled as normozoospermic, there has to be an adequate concentration of sperm that is normal in appearance and function. During the evaluation of a couple for infertility, if sperm testing of the male partner reveals normozoospermia, the infertility is most likely related to a female factor.

FertilitySmarts explains Normozoospermia

To fertilize an egg, sperm has to find its way from the vagina through the uterus and into the fallopian tubes. For fertilization to occur, an adequate number of sperm need to be deposited in the vagina and these cells need to have the energy and the movement to complete that long journey. Even the smallest defect in sperm cells can make them lose their ability to conceive.

A semen analysis is the first and the most important step in an evaluation of male infertility. Abnormalities in the quantity or quality of semen warrants further evaluation of the male partner.

The table below shows the main parameters of semen that are vital for a thorough evaluation of male fertility and their reference values according to World Health Organization (WHO) guidelines.

ParametersReference value
Semen volume
> 2 milliliters
Sperm concentration
> 20 million per milliliter
Sperm count
> 40 million per ejaculate
Sperm morphology (appearance)
> 15% normal appearing sperm
Sperm motility (movement)> 50% progressive motility (moves forward in a straight line)

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