One-third of infertility cases are caused by male reproductive problems, ranging from lifestyle factors to abnormal sperm production, abnormal sperm function, abnormal sperm delivery, physical trauma or previous cancer treatment.
One in six couples have difficulties getting pregnant. Overall, one-third of infertility cases are caused by male infertility, one-third by female infertility and another third by both male and female reproductive challenges or by unknown factors.
Causes of male infertility may include: