Should i do DNA tests?

I have four children from previous relationships but have failed to make my wife of two years pregnant. I secretly went for semen checks and was told I have no sperms. Are the other children mine? I fear to do DNA tests. Kenneth

Dear Kenneth,
Bearing children, or failing to, is dependent on both a man and a woman and thus the need for both partners to visit a doctor for help in case of failure. However, first checking yourself secretly helps you to gain confidence to do other tests. The commonest cause of failure to get off spring yet one had them before, is blockage of the tubes that carry sperms from the testes to the penis. This may be caused by STDs acquired after begetting the other children. The STDs may cause wounds in the delicate tubes which may heal with scars that may lead to the blockage.
There are cases where the sperm is absent because of retrograde ejaculation, an incident in which the semen and sperm go to the bladder instead of coming out through the penis. This may happen with prostate problems that accompany aging but the tests would fail to get any semen.
Also, a man with a low sperm count may manage to have children when younger, with a young woman (their fertility is usually very high), but fail to have more later in life. Here, a low sperm count instead of no sperms at all would be found. That said, these scenarios could be the reason you had children before but failed to have them afterwards.
Operations can be done to open up the tubes but usually, these do not succeed requiring more difficult surgery to get sperms directly from the testes and do IVF. Today, the commonest DNA tests are for finding out who the father of children is but may be stressful to the family the reason you fear doing the tests. Since you are scared of doing the tests, please don’t after all people fail to get children and simply adopt children, they have no psychological or blood relationships.