Normal morphology rate generally refers to the rate of normal sperm morphology, 6% being normal. Normal sperm morphology rate is the percentage of normal sperm including normal sperm heads, bodies and tails out of tens of millions of sperm in a semen examination. Normal sperm make up at least 4% of the total and abnormal sperm are in the lower 96%. The test involves extracting more than 200 sperm from the semen, sampling them, and examining them to get an approximate ratio of normal to abnormal. Usually, if there are normal sperms, a normal pregnancy is possible. If there are tens of millions of sperms, then there are hundreds of thousands or millions of sperms that are normal and are perfectly fine for pregnancy. Thus, there are many reasons for increased sperm abnormalities, both external and internal. A normal sperm morphology rate of 6% is usually normal, but it is not below normal that pregnancy cannot occur. If the sperm morphology rate is abnormal, further tests should be done to check and treat the abnormality so that pregnancy is not affected.