Abnormal sperm morphology
Morphology is the characteristic that describes the external appearance of the sperm from head to tail. The Kruger and WHO are the two predominate methods used the assess sperm morphology. There are always abnormal sperm in the ejaculate the critical question is how many. Abnormal sperm morphology does not mean you cannot get pregnant and it does not mean if you do get pregnant there is an increase incidence of birth defects. It is always important to put morphology in the context of the other parameters and to determine if it is and indicator of abnormal function.