Sperm morphology and fertility
This measures many features of the sperm and semen the fluid in which the sperm are contained. The most important of these are the number of sperm sperm count , motility of the sperm percentage of moving sperm , morphology of the sperm percentage of normally shaped sperm , and the volume of fluid. To assess sperm morphology, the sperm are examined under a microscope and the percentage of abnormally shaped sperm is estimated. Sperm morphology is assessed using one of 2 sets of characteristics. Kruger criteria are strict and consider minute irregularities as abnormal. World Health Organization WHO criteria are more lenient and do not classify as many sperm as abnormal.
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Sperm Morphology (Shape): Does It Affect Fertility?
Sperm morphology: Tests and results
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How Does Sperm Morphology Affect Fertility?
Sperm morphology — the size and shape of sperm — is one factor that's examined as part of a semen analysis to evaluate male infertility. Sperm morphology results are reported as the percentage of sperm that appear normal when semen is viewed under a microscope. Normal sperm have an oval head with a long tail. Abnormal sperm have head or tail defects — such as a large or misshapen head or a crooked or double tail. These defects might affect the ability of the sperm to reach and penetrate an egg.
Patient charts were reviewed with men contacted and administered an Institutional Review Board IRB -approved telephone questionnaire to ascertain outcomes. After a median follow-up time of 2. Strict morphology should not be used to predict fertilization, pregnancy, or live birth potential. Semen analysis is a critical tool in the assessment of the infertile male; however, the importance of sperm shape, or morphology, is controversial.