What all reports or investigation have your wife undergone, having a look at it would be helpful.
Secondly you can take those medications, that will definitely help, but I doubt that alone can help.
Definitely any sort of tobacco use is not advisable as though the reports shows fairly normal semen analysis, but as per ayurveda tobacco use can affect the quality of semen.
Detailed discussion is advisable as in menstrual cycles, any contraceptive measures used till date like birth control pills, days of intercourse, any past medical history of any of the couple, some times stress also affects the conceiving any many more things does need to be taken into consideration.
Not just medication but ayurvedic panchakarma treatment to prepare proper and healthy uterus to conceive for the couple ( detox ) can also be beneficial.
This and many more details needs to be discussed before any advice is provided.
Next Steps
please connect on Practo for consultation for further evaluation and management.
Health Tips
Mean while avoid use of tobacco.
Both husband and wife must do exercise, yoga especially meditation.