Physician's WeeklyInfertility in women under 35 is the inability to become pregnant after regular unprotected sexual intercourse for 12 months or more. CausesThe myriad of causes of infertility shall be reviewed under the following headings – Exclusively male causes; exclusively female causes; and causes that can affect both males and females. Male Causes• Low sperm count• Abnormal sperm motility• A high percentage of defective sperm• Recurrent and protracted increase in testicular temperature – (e.g. • Ultrasound examination of the scrotum to assess the testicles• Trans-rectal ultrasound• Post ejaculation urinalysis• Blood testosterone levels• Prolactin levels• Genetic testing. Please consult a medical professional or healthcare provider if you are seeking medical advice, diagnoses, or treatment.