Hi.Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concern.
Mild asthenospermia means that you have reduced motility of sperms. Normally 50% of sperms should have progressive mobitily, which is reduced in you.This might be the cause of
infertility problem you are facing.
As you have partial Asthenospermia, To some extent, motility can be improved by following steps:-
1.Avoid
masturbation.
2.Keep far away from chemical/ industrial agents.
3.Keep a healthy diet.
Stress level in normal life should be reduced.
4.Avoid
smoking, drinking & sitting up late or all night
5.Avoid having hot bath or
steam bath.
Refer to your physician for consultation
Don't worry you would be fine
Hope this information helps.