<s>[INST] Age- 36, ht. 6'2'', wt. 180 lbs Question:I have had 2 separate semen analysis completed using the Kruger morpholgy test and both came back with 90% abnormal head of sperm.  Based on all my research as to risk factors for causes, I don't fit any of the common risk factors, so why do I have such a high % of abnormal sperm?  What can cause that? [/INST] Good Day and thank you for being with Healthcare Magic!Stress is the number one cause of your semen abnormality. I would suggest getting a scrotal ultrasound with Doppler to check for varicocoele since it is the most common cause of sperm abnormality and is present in 50% of men who are infertile.  I hope I have succeeded in providing the information you were looking for. Please feel free to write back to me for any further clarifications at:   I would gladly help you.  Best wishes. </s>