Thanks for your query,based on the facts that you have posted it appears that your husband has varicocele and his semen analysis
has revealed Asthanospermia,(Low sperm motility
). but you have not posted semen analysis report in details
I would like to state that varicocele can not be cause of low sperm motility.
As regards improvement in sperm motility after varicocele surgery one can not assure you to improve sperm motility after surgery.There are 30 % chances of improvement in sperm count
Hence it is very difficult to predict that you will conceive after surgery. Please consult qualified Infertility
specialist for further guidance and explore possibility of pregnancy with the help of new assisted reproductive techniques
like IVF or ICSI.