I would suggest that you go for TESA or MESA depending on your health condition. Any other issue you have?
Go for TESA. It will solve your purpose.
If you have low sperm motility, then you can opt for PESA or TESA after consulting your infertility specialist. It is useful if the sperm motility is low. One of my friend's case involved the same and it was helpful for them. This help you have a baby soon.