Abnormal sperm miscarriages
Recurrent Pregnancy Loss
Abnormal sperm morphology: What does it mean? - Mayo Clinic
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Description: Hwang K, et al. This occurs when a pregnancy is lost shortly after implantation, resulting in bleeding that occurs around the time of her expected period. The other possibility is that the defects caused by abnormal sperm are lethal and incompatible with embryo development beyond a particular point. What are the possible explanations?