How many times semen test was done? If only one time, he can repeat the test once more with 2-3 days sexual abstinence, as one semen analysis
is not sufficient to draw any conclusion. If its already done more than once, IVF/ICSI
is best option for you for conception. IVF will give you decent chance of pregnancy
between 30 & 50% per cycle, depending on your ovarian reserve
& the center's success rate where you are attempting it.
Wish you good health.