In many cases of abnormal sperm shape (or morphology), there is defective or fragmented DNA which can lead to pregnancy but abnormal development and loss of the embryo. Additionally, stress to the sperm head due to oxidative damage can lead to poor fertilization.

Does morphology affect pregnancy?

Morphology can affect fertility because sperm need a certain shape to be able to penetrate the outer layers of the egg. Most men with abnormal sperm morphology are still able to father a child, but achieving pregnancy may take longer or require assistance from a fertility specialist.

Can sperm morphology cause birth defects?

Issues with sperm morphology pose a number of problems for people who would like to have a child of their own. In broad terms, sperm morphology affects the motility of the sperm and can also increase risks of birth defects and serious health disorders.