Men can also contribute to infertility in a couple. In fact, men are found to be the only cause or a contributing cause of infertility problems in couples in about 40% of cases.
To conceive a child, a male's sperm must combine with a female's egg. The testicles make and store sperm, which are ejaculated by the penis to deliver sperm to the female reproductive tract during sexual intercourse.
The most common issues that lead to infertility in men are problems that affect how the testicles work. Other problems are hormone imbalances or blockages or absence of some of the ducts in the male reproductive organs.
As a man, if you have been trying so hard for a while now to impregnate your wife but have been unsuccessful, there is possibility that you might have a low/zero sperm count or any other related cases such as Varicocele, Hydrocele, low sperm motility/morphology and so on.
Also called Oligospermia, a person is said to have low sperm count when he has fewer than 15 million sperm cells per millilitre of semen.
In the same way, a person is said to be suffering from Azoospermia if he has no/zero sperm cells in his semen/ejaculate.
Both cases of low and zero sperm count lessens chances of being able to fertilise your partner’s egg, hence reducing chances of pregnancy. This is just the same way other male infertility issues such as varicocele, hydrocele, low motility and bad morphology reduces the chance of pregnancy too.