The causes of male infertility are very numerous and are not always easy to determine. In some cases, infertility can result from obstruction of the male genital tract or injury. In other cases, it could come from an insufficient number of spermatozoa, a reduced motility of the spermatozoa or the abnormal form of these spermatozoa.
Azoospermia is the absence of spermatozoa in the ejaculate.
OATS are defined as low concentration, reduced motility, or abnormal sperm form. This is not a problem of infertility, but rather a decrease in fertility.
Some couples do all the fertility tests on offer, but these tests do not determine the cause of their infertility. Further examinations may be necessary.